Now I’ve restructured to a walking desk, and the hardest part of that was parting with the Aeron. It’s definitely the comfiest seat in the house, and not just for “task” sitting. Someday, I want to convince the spouse that we need a “war room” styled dining set, replete with a slate table and Aeron chairs all round.

I am sitting on a brand new leather sofa that is part of a suite that was pretty expensive and my wife loves the design and I cannot get comfortable in it at all.
I have mild scoliosis but it seemed ok for the 15 to 20 minutes we tried it in the showroom. I wonder if they could apply the same principles to domestic seating ?

I suffer from what is called hyperlordosis, or forward hyperextension of lower ( lumbar ) spine. I find most chair with lumbar support to excasarbate the condition. In other words, I find lumbar support pushing my lumbar spine forward even further. Chairs without lumbar support are equally bad for my back.
Over the course of last few years I set in several Herman Miller chairs: Aeron, Mirra and currently own Embody
My overall impression is that HM chairs are more about style than ergonomics.
Lumbar and back support is in my opinion one of the worst in the industry, and Embody particularly fails in this area. Pixelated support in lower back on Embody is too hard and inflexible causing actually my mid back to overly flex and arch, instead of providing support.
Aeron was terrible due to sharp and uncomfortable edge on the forward sloping part of the seat. While it did provide some support in the lower back, it tottaly failed to provide any in the upper back.
Also, I’m not sure why, but neither Embody nor Aeron have option for being equipped with arm rests that can be adjusted forward and backward.
Arm rests on these stick too far out, and it’s impossible ( for me at lest ) to keep arm rest at the desk level and bring chair close enough so I can type on the keyboard without bending my upper back forward.
I have a feeling these chairs are not properly tested for work in front of the computer when they are designed.

Anyways, my negative experiences with HM chairs can be attributed due to my lumbar hyperlordotic condition, so please take above statements with caution.

Finally, can anyone recommend good chair or solution for people suffering from lumbar hyperlordosis? I have seen several physicians, chiros and physical therapists, but no treatment gave any positive results, nor were they able to offer any practical or usefull advice on dealing with this condition while at work ( FYI I’m full-timve software engineer ). Even if there are any benefits from the treatment, they are easily undone by even few hours of work in front of the computer.
The condition is causing me lots of grief and it is seriously impacting both my overall well being and work performance. Any advice and tips will be hugely appreciated!