Real owners rate these about evenly: 62% of 24 Sihoo Doro S100 owners recommend it, vs 58% of 81 for the Leap V2.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
The pattern here is a chair owners rate highly from the lumbar up and argue about from the seat down. Praise clusters on the backrest and the lower-back support, with several owners saying this was the chair that ended their desk-related back pain after other premium models did not, and on how far it adjusts once the time goes into setting it up. Longevity is not in dispute: owners report six, ten and fifteen year chairs still in service, with cushions and armrests replaceable rather than terminal. The complaints cluster just as tightly. The seat pad is thin and firm, and for a sizable group that turns into tailbone or sit-bone pressure within an hour or two rather than a vague preference; some add padding, some live with it, and a few stopped sitting in the chair. The lumbar insert is aggressive enough that taking it out is common advice among owners rather than a fringe fix. Smaller groups report play in the recline with the back locked upright, and owners with long legs run out of seat pan. Several owners also push back on the chair's reputation, saying it did not match what they had been led to expect. This is not a chair that wins people over on first sitting, and the owners who need immediate softness are the ones who leave.
“great price and well built product...this is awesome”— @patrickcadette on YouTube
“I recently bought a Doro S100 and it's very comfortable. Now, I wouldn't recommend it if you are above 6.”— MobBap on Reddit
“I recently purchased a Sihoo S100 chair and after 2 days of use there was staples popping out of the side of the seat. This caused one side of the seat to essentially deflate.”— MikeyyGee124 on r/OfficeChairs
“They’re fantastic. I have leap v2 at home with atlas headrest…. And some other steelcase leap chair at work (not sure of model it feels way more robust tho lol) both very comfortable.”— Diotima245 on Reddit
“Worth it for me as I'm having back issues as well. The only thing I'd say I would want better is the height adjustment. I'm 6,2 and wouldve preferred maybe half an inch extra height.”— Substantial-Bid-6516 on Reddit
“All the leap v2s I have in my work office doesn’t incline back in a way that supports me/pushes me back up when I stop reclining. So it’s very annoying and idk if I can fix it”— tdrip25 on Reddit
Real owners rate these about evenly: 62% of 24 Sihoo Doro S100 owners recommend it, vs 58% of 81 for the Leap V2.
Owners point the Sihoo Doro S100 at budget-conscious buyers wanting a good-looking ergonomic chair, and long-hours sitters who want firm lumbar and smooth recline.
Owners point the Leap V2 at people with lower-back pain who want support rather than softness, and anyone sitting full workdays upright at a desk.
The most-cited downside of the Sihoo Doro S100 is lumbar support is too aggressive and forces an uncomfortable upright posture. For the Leap V2, it's the seat pad is thin and firm, the single most repeated complaint here..