I never review purchases but I had to here. This thing is legit. Use the shopping guide to make sure you are purchasing the correct size. These chairs are literally a custom fit. I researched these chairs for a week and the thing that pushed me over the edge is the comparison to the generic brands. I can't post it here but it's on website.
I had to sit in my old office chair while letting my kid try it out while we had a little gaming session and I can't believe I sat in this old uncomfortable office chair for three years before getting the Andaseat.
I work at a computer for 8 hours a day and I don't feel sore after being all hunched over sitting on my leg on the seat. This chair puts your body in the correct posture all day and you don't even notice it. I feel like I haven't been sitting all day!
Hope this helps. I love it.