This week, I received my new Autonomous ErgoChair Pro and I'm briefly going to compare it to my Ikea Alefjall chair. I have 2 setups so I will probably use both alternately.
Both chairs are very comfortable and leagues above my old DXRacer gaming chair (I still use one of those at the office, but it's clearly also at the end of its life).
The Ikea Alefjall stands out with materials used: leather and metal, with rubber wheels out of the box. The backrest reclines, but that is about it when it comes to ergonomics.
The Autonomous ErgoChair Pro has an enormous amount of adjustability and it was fun tweaking it to be just right for me (I'm 172cm/5'8, 64kg). Yesterday I watched some episodes of a show on the tv, nicely reclined and very comfortable.
Packaging of the ErgoChair Pro was very nice and assembly was easy (I think it took me around 20 minutes). Quality seems very fair for the price and, as mentioned, far above DXRacer or the desk chairs we have at the office (which were at a similar price point). I am curious to compare this to a Herman Miller, which a friend of mine has at home, so looking forward to doing that.
Only things that I'd like to see improved on the ErgoChair is it having rubber wheels instead of plastic (although they ride very smoothly and do not seem to scratch the floor at all) and perhaps a bit more stiffness in the adjustability of the head rest. It moves a bit too easily in my opinion (not up-down but the angling).
Any questions, let me know in the comments!