I put this chair together myself! For me that's huge. It took about 25 minutes. The directions were very clear color coded and had excellent pictures. The best part is sitting in my chair everyday as I work from home. No more lower back pain. I'm extremely pleased with my purchase and it looks great in my room. Also staff at Staples was very helpful and accommodating.
I give the chair a 8.5 for comfort and 9 for sturdiness (out of 10). It is ergonomically a great chair to aid in good posture during long days sitting behind a desk. I personally like mesh chairs that breath well which helps reduce sweating when sitting for long periods of time.
After reading numerous reviews for this and the Hyken I ended going with this off the recommendation that this is identical in every facet other than in added roominess. I have to say this is an amazing chair that is not only comfortable but built well. Assembly was simple and the extra roominess that it supposedly has over the Hyken is very much welcomed. It isn't huge per se but more of what I would consider a "normal" chair to be in which case you could consider the Hyken as slightly narrower then. There is extra room between you and the armrests without having to worry about the sides hugging you and depth-wise it supports under your knees well with enough mesh seating so you're not resting on any hard plastic. If anyone is on the fence between the two as I was I hope this somewhat helps describe how the Dexley feels.