It took about 45 minutes to assemble, I am not sure what these 2 hours + reviews are about. In total there are 16 screws that you have to tighten, it is a bit tricky to slide the parts in to place and you might need a second person for it, but it's quite easy. 

The chair itself is quite comfortable, I am 310 lbs and fit fine, however I defiantly see people heavier then me being uncomfortable. 

My use case was that I got it for my home office, as my kids like to hang out while I am working.