I am a teacher and we do a lot of walking and standing on our feet during the day. So much so that I raised my desk using cinder blocks so that I could stand behind it and keep on moving. After about 3-4 months I decided I also needed to be able to comfortably use my desk with a chair and the normal desk chair that I had just wasn't cutting it. I ordered this chair so that I wouldn't have to lower my desk (I really like being able to use it while standing up) and I love it. I was able to assemble it myself in my classroom using just a large flat head screw driver in about 30 minutes or less. 

Pros: Great value, very comfortable, easy assembly
Cons: Very Slight Wobble, would not use if was planning to sit more than a couple of hours a day (not great for 8-12 hour sitting shifts)