Real owners rate these about evenly: 65% of 43 Herman Miller Aeron Size B owners recommend it, vs 62% of 24 for the Sihoo Doro S100.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
“Reclining to meditate in this chair is amazing!”— @kylelangley8818 on YouTube
“The Aeron Remastered and the Classic are both really amazing. Cannot beat the recline and the adjustability of just about every aspect of what’s important for tasking or relaxing.”— @MichaelCConti on YouTube
“I wanted to love my HM Aeron (supplied by work), but in the end my $150 Covid Office Depot chair is way more comfortable. Chairs are such a personal item and brand/cost don’t guarantee comfort”— 2ChanceRescue on r/BuyItForLife
“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
Real owners rate these about evenly: 65% of 43 Herman Miller Aeron Size B owners recommend it, vs 62% of 24 for the Sihoo Doro S100.
Owners point the Herman Miller Aeron Size B at all-day desk workers wanting posture and back support, and buyers seeking a decades-lasting, repairable chair.
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.
The most-cited downside of the Herman Miller Aeron Size B is uncomfortable for some bodies despite the hype. For the Sihoo Doro S100, it's lumbar support is too aggressive and forces an uncomfortable upright posture.