First impressions were very good, but after some use i'm a little disappointed. very easy to assemble, only took me about 15 minutes. Felt quite study and my first sit was very, very comfy. the foam felt great and I was able to sit for a solid couple hours with no trouble. The breathable mesh backrest is great, and the fact it's vertically adjustable is perfect for me at 6ft6" and weighing 100kg. Also the lumbar support is good, albeit a little firm. Arm rests are comfy to lean on, but a little wobbly; overall not bad. My biggest gripe is with the seat. At first the foam felt luxurious but after a couple of weeks of light use (maybe 1-2 hours a day if that) it has flattened quite a bit. Now after 45mins-1 hour i can feel the hard board underneath. It's worth noting I'm a big guy, but I feel this is a little quick for the foam to be basically useless. I had to buy a memory foam seat cushion to put on top which is not ideal.
Overall, if you have a small frame and don't weigh much I can see this being an excellent chair. But for someone like me I can't recommend. The product description says it supports up to 150kg but I just don't think this is accurate. I would say it's better to spend perhaps another £100-200 and get something better.