So Ive tried both the Emerge Vartan and the Emerge Vortex for an extended time and both pale in comparison to this chair this one has proper low back support and neck/head support for extended periods of sitting it doesn't catch your eye like those do but thats just another thing i like about this one its simple yet extremely comfy. Have one in my house and got a second one for out in the shop.
This chair is comfortable just long enough for you to keep it. The arm on mine broke so Staples replaced it. The new one started leaning replaced the seat with spare parts from the 1st replacement and now the springs in this one are broken. Im not a very large man or anything this is basic stuff. Look elsewhere for better construction and durability.
For the price this chair was a great buy! I sat in several chairs to try to figure out the best one for my comfort level. By far the most comfortable and reasonably priced chair. Highly recommended!!