Guitar Pedals · owner-verdict comparison

Holy Grail Nano Reverb vs Keeley Compressor Plus: what real owners say

Real owners rate these about evenly: 60% of 15 Holy Grail Nano Reverb owners recommend it, vs 61% of 69 for the Keeley Compressor Plus.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

Holy Grail Nano Reverb

60%of 15 owners recommend
60% recommend · 7% neutral · 33% don't
Owners praise
  • One knob and nothing to set up, which is the strength owners name most often
  • Works as an always-on reverb that gets set once and left alone
  • Spring mode is the sound owners single out as getting it right
Owners complain about
  • Limited range, with none of the long trails or ambient washes some players expect from a reverb
  • Plain next to modern reverbs, and several owners went back to pedals they already owned
Full owner report →

Keeley Compressor Plus

61%of 69 owners recommend
61% recommend · 13% neutral · 26% don't
Owners praise
  • Blend knob keeps pick dynamics intact while still compressing, and makes subtle settings easy
  • Single-coil/humbucker switch handles guitar swaps without re-dialing anything
  • Smooth, largely uncolored compression that owners leave always-on
Owners complain about
  • Audible hiss and broadband noise, by far the most common owner complaint
  • The noise scales with the sustain knob, so the usable sustain range is narrower than the knob suggests
  • Buzz is worst with single-coil guitars, where several owners called it unusable
Full owner report →

Which should you buy?

Get the Holy Grail Nano Reverb if
  • ✓Players who want one reverb parked on the board and never touched again
  • ✓Small combo amps with no reverb tank of their own
  • ✓A first pedal, where one control beats a menu
  • ✓Boards where a spring flavour is the goal rather than ambient texture
Skip it if
  • Players chasing long trails, shimmer, or washed-out ambient sounds
  • Anyone who wants control over decay, tone, or mix beyond a single amount knob
Get the Keeley Compressor Plus if
  • ✓Players switching between single-coil and humbucker guitars on the same board
  • ✓Anyone who wants an always-on compressor that can be dialed back with a blend control
  • ✓Buyers stepping up to a first serious compressor who want simple controls
  • ✓Players who also need a clean or lead boost from the same enclosure
Skip it if
  • Quiet clean playing or recording, where a raised noise floor is hard to ignore
  • Single-coil players who are sensitive to buzz and hiss

What Holy Grail Nano Reverb owners say

“I have the nano but same... Spring always on. It was my first pedal and I don't think I've ever turned it off!”
— dnlprn86 on Reddit
“Great simple reverb. If you’re looking for huge trails, etc. it’s not what you’re after but if you want an easy set and forget, solid sounding reverb it’s still hard to beat, especially for the used price.”
— Palomar_Sound on Reddit
“good but quite plain isn't it and there are so many other pedals that cover this sound entirely plus more, dunno why someone would get this where there's so much better available.”
— Thereminz on Reddit

What Keeley Compressor Plus owners say

“The Keeley compressor has been on my board for a long time and it works well for me. I switch guitars between a tele and a es-135, so the simple single coil/humbucker toggle switch is a very useful feature.”
— Sensitive-Muscle2606 on Reddit
“I'll say the only reason I left the Keeley for the Wampler was because the Wampler comes in mini... Both are great. Love the pickup switch on the Keeley too”
— chancesteward on Reddit
“My compressor Plus buzzes like crazy with my single coil guitar and it drives me nuts. I find if you turn down the sustain knob it helps, but having extra sustain is kinda the point.”
— MedicineforMadness on Reddit

Holy Grail Nano Reverb vs Keeley Compressor Plus: frequently asked questions

Is the Holy Grail Nano Reverb or the Keeley Compressor Plus better?

Real owners rate these about evenly: 60% of 15 Holy Grail Nano Reverb owners recommend it, vs 61% of 69 for the Keeley Compressor Plus.

Who should get the Holy Grail Nano Reverb?

Owners point the Holy Grail Nano Reverb at players who want one reverb parked on the board and never touched again, and small combo amps with no reverb tank of their own.

Who should get the Keeley Compressor Plus?

Owners point the Keeley Compressor Plus at players switching between single-coil and humbucker guitars on the same board, and anyone who wants an always-on compressor that can be dialed back with a blend control.

What do owners complain about?

The most-cited downside of the Holy Grail Nano Reverb is limited range, with none of the long trails or ambient washes some players expect from a reverb. For the Keeley Compressor Plus, it's audible hiss and broadband noise, by far the most common owner complaint.