“It's VERY juicy, smooth and broad for a Japanese M. An absolute dream to write with, but I do think you might find the M a bit too much if you are accustomed to writing with Fines”

72% of 279 verified owners recommend the Pilot Custom 823, based on real owner verdicts aggregated from Reddit, enthusiast forums, and YouTube.
The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, blogs with no affiliate links, and YouTube owner-comments when they line up with owners. is shown for perspective but kept out here — hover the i for why.
Synthesized from what Pilot Custom 823 owners say — not a spec sheet.
“It's VERY juicy, smooth and broad for a Japanese M. An absolute dream to write with, but I do think you might find the M a bit too much if you are accustomed to writing with Fines”
“I personally didn't love it enough for the price. It's a thick pen, so you have to like something a little girthier in your hand, and I didn't love the vacuum feed, either.”
“Coming from using ballpoint and safari, I felt 823 M was too slippery and wet. It made my hand writing ugly. Now it’s one of my favorite pens after a few years and many pens used.”
“I had issues with mine. I unscrewed the end cap, rinsed the nib with slightly soapy water and the Signature nib was still inconsistent regardless of position on the page.”
“while the m is really smooth the line thickness is too much for my hand writing and since I've experienced the m, while I like the f nib line thickness I miss the smoothness.”
“It feels much more substantial in the hand and is nicer to hold, IMO (because of the metal mechanism) and I feel like the nib writes smoother and wetter, which is my preference.”
“It took a while with a few different inks to get my 823M writing the way I like it. It still seemed a bit wide, so I went with a fine. As lovely as it is, it’s too fine.”
“823 is perfect if you already found your "main" ink and in my case, the iroshizuku shin-kai because the ink capacity is awesome but cleaning and switching inks can be a hassle.”
“I have owned an 823, mostly due to the fan service it got. It is, without a shadow of doubt, a lovely pen. It is also, absolutely, over hyped.”
“I like the vac filling system when I'm flying because it travels really well, but over all it is probably my least favorite filling system.”
“Love my 823 lol... Cleaning: Just fill it and drain it over and over. It's going to take some time. And you will find out why vacuum filling pens arent great when you change inks often lol.”
“Tbh one of my great regrets is getting the custom 823 in fine - wish I would have went medium - it’s so fine and has some feedback which has made me never quite love the pen as much as I wanted to”
“It is my grail pen but when I got it found it was really big in my hand so I don’t really use it. That being said it writes like a dream and I do love using it”
“In the 2 years I've been the happy owner of all 3 Custom 823 in F, M and B nibs, I can tell you that no pen quite holds such a special place in my heart than the 823 (F).”
“the one I got was disappointing, the F nib had way too much feedback for my liking and it wrote incredibly dry and the nib was too stiff”
“Have two of them and love them, but I do have one qualm: the vacuum-piston design will only write for a page or so before you have to crack it, and the way it tells you is by starting to run out of ink.”
“823 is one of those pens that even when I don’t have it inked, I’m thinking about inking it again. I have three (the 4th on the way) and all of them are magnificent.”
“I’ve been disappointed with my 823s. I’ve looked at the nibs with a loupe and the tines on both are too tight, and so write too dryly.”
“My 823 F refuses to write when the nib is pushed forward. Have to put extra pressure just to get it to even write normally.”
“Honestly one of the best pens that I own. I've never had an issue. The nib is buttery and flows beautifully with any ink I use. It's worth the cost in my opinion.”
“What I didn't like was not the tines were misaligned OOTB. This pen drove me so crazy I broke down and bought a digital microscope so I could adjust the nib.”
“Fantastic pen but the vac fill is annoying to clean, can’t do partial fills as easily as a piston fill. Love the writing experience but not my favorite pen”
“any more luxury Pilot pens I buy have a skipping issue when I'm writing with them, and the 823 was the biggest culprit.”
“Melting butter on glass and then tilting the glass left and right. Dry erase marker on a dry erase board without the dry. Think better control than ballpoint with the same melody, better instrument.”
Practical notes owners raise — setup, quirks, and issues to watch for. They don't say whether the person likes the product, so they're not counted in the score, but they inform the pros, cons, and who it's for.
“I just brought mine to a nibmeister today. He’s going to grind it from a medium to a medium fine. It should take about a week and I’m very exited, like getting an entirely new pen!”
“That’s a smooth one! Enjoy! I got mine a couple of months ago. https://preview.redd.it/ecfak91gpmvh1.jpeg?width=4032&format=pjpg&auto=webp&s=69cbe68e0916268227da21ca8aceadedda3c5270”
“That doesn’t make the 823 a bad pen (it’s not), but I think it leads to confirmation bias by users who aren’t familiar with or have extensively used better or more expensive pens.”
“These are totally different pens because the Pilot is a vac-fill. If you need a large ink capacity, do the Pilot. If you want lots of pretty colors in cartridge form, do the Sailor.”
“Actually, rest assured that paying more won’t get you a better writing pen than the 823. Maybe a nibmeister could achieve that, but not a better nib. The 823 is as good as it gets”
“Agreed. It is just a smaller pen, but almost the same writing experience. And 74 is c/c too, that means easier clean up. 823 kinds voids the warranty if you unscrew the grip section.”
“The Custom 823 does not have a blind cap. These are blind caps. https://preview.redd.it/tl4r7lclgvgh1.jpeg?width=4032&format=pjpg&auto=webp&s=77aab4332ac1f2aadfe918858ebdfbd7b53f5e25”
“The 743 uses the same nib as your 823. If you end up liking the Waverly, you could always swap the nibs and sell the 743 with your swapped M nib if you end up not wanting to keep it.”
“I don't have an 823, but this is what I do with my custom 74 because the con 70 is also a pain to clean. I just replaced platinum blue black in it with diamine grey, for example.”
“Of course there'll be pen by pen variations, and exceptions, and all that stuff, but just in general, vacs, pistons, eyedroppers, can supply the feed with ink more readily than a c/c.”
“Buy once, cry once :) Pilot 823 is a fantastic pen! If you're the kind of person that wants one amazing pen and will stick to one ink color, then you would be pretty happy with an 823.”
“Watch the video by Yoskea Stationery comparing the nib sizes on the Custom 743. This pen uses the same nib size (#15) as the Custom 823. https://youtu.be/j3qDkfZYrcA?si=wUUEn2OGEfct0TZf”
“IMHO, the gold trim only looks nice on the amber. Someone posted a smoke 823 they'd sent to fpnibs.com to get the trim rhodium plated & I thought that looked pretty fantastic.”
“Nice choice. I have an 823 . Get some pen flush alongside whatever next ink you inevitably buy. That Chou Kuro is lovely but as a pigment ink it warrants a little extra care.”
“I just change inks like normal. The probability of inks being incompatible is so very low. And a few plungers worth of water cleans it pretty well anyway. Don't overthink it.”
“I dropped my 823 yesterday :( i bought it a week ago and it landed nib down. The tines are facing opposite directions. Nibmiester in store in a few weeks near me. Gonna get it tuned for 70”
“Larry post have loan pens that you can 'hire', and then get a credit to buy the pen with. I highly recommend using the service so it eliminates all doubt for you. Jen at Larrypost is great.”
“I completely agree with you. I don’t think someone who is thinking of a 300 quid pen for a first purchase is going to use a kakuno beyond “oh yeah that nib size is fine”.”
“Twinsies!! Colorverse Coffee Break is pretty much the only ink I put in my Pilot Custom 823 Amber . It’s like the pen goldilocksed its way into that ink… Scrumptious handwriting, by the way!”
“What do you think of the vs. nib on the 823? Will put Iroshikuzu Asa-Gao in it. Based on my Pilot Metropolitan, its is like other s. But seems others suggest with that ink will be too wet....”
“Hey! Ive previously used a TWSBI Eco and a Pilot Metropolitan, both of which weren’t my own. I feel confident that this fountain pen is quality built based on all the reviews I’ve read up on!”
“I don't know if it's me but I haven't noticed much sheen with this ink even with an italic nib. I've used rhodia and leuchtturm paper, maybe tomoe river would show it more. It's quite subtle.”
“It isn’t expensive… for what it offers. Heck, IMHO, it is a much better fountain pen than modern Montblanc 146. Plus, it is overengineered in the sweetest japanese way.”
“If you are writing kanzi calligraphy, sailor nib may be the best for control and feedback. For English writing, Pilot will be always smooth. But Japanese pens are dryer than the European pens.”