I am 6'1" tall and 180 pounds. The cheap office chairs that I've always used before have never been big enough for me really. It got to the point that they were starting to make my lower back and hips hurt if I sat in them for a long time or off and on all day for days at a time.
I finally decided to do something about it. After weeks of research, I chose this chair. So far, I'm very glad that I did.
It raises up high enough that my knees are level with my hips and so that when my keyboard is on my desk, my elbows are the same height as the top of the desk. This makes for a more ergonomic experience that prevents soreness over time. It also lets me keep my wrists straight and flat which helps as well.
The seat is firm, but not hard, with plenty of support but without exaggerated wings on the sides. The chair back is supportive too, especially with the lumbar and neck pillows in place. Check out the pictures to see how I strapped them on so that they'll stay where I move them to.
The chair is made of quality materials such as steel, heavy gauge plastic (only on non-load-bearing parts - no plastic in stress points), straps and fabric that seems very durable. It is a little heavy, but that is good since light chairs are flimsy chairs.
The arm rests are cushioned with a firm, but yielding pad covered in a durable rubber and can be adjusted in almost every way - width apart, height, forward and back, and swivel in or out. They came already attached to the chair, but can be removed if you take out the Allen bolts in the bottom of the seat. If you just loosen those bolts, you can adjust how far the arms are apart from each other. I like them at their closest setting with them swiveled towards each other and moved all the way forward.
The height adjustment lever feels solid and can be locked in place so that the chair won't gradually lower itself. The chair back reclining lever is also sturdy and gives you several tilt positions from having the back almost folded over the seat to reclined almost in line with the seat in a laying down position. I prefer having it tilted a little bit forward while typing so that I can rest my head on the pillow rather than finding myself hunched forward as I used to usually do with other chairs.
The wheels base is made of solid steel rather than plastic like my old chair was. The wheels themselves are plastic, but they are not hollow and they seem to be made of a very durable plastic. They roll on low carpet quite well without a chair mat.
The shock and pedistal stand that holds the chair up seems quite sturdy, especially if you turn the knob on the seat tilt spring towards tight rather than loose. You can set it to loose so that the seat tilts, but to me, that makes the chair feel top heavy like it might tip over.
The seat back has racing seat style wings on it but they are far enough apart that you'd have to be a very wide person for your shoulders to hit them. I think they are there more for looks than anything.
I have scoliosis, so my lower back bothers me most of the time. While sitting in this chair, my back feels supported enough that it dosen't start hurting after an extended time. So, if you have back and/or hip issues, this chair might be just the thing.
One thing I can think of that might be a negative is that if you are a really short person, you may find this chair too big for you. The lowest setting isn't very low compared to some other chairs I've sat in. You also may find the arm rests to be too far apart, even after adjusting them, if you are a small person. This is a chair for big and tall people.
I don't know if your chair will come this way when you order it, but mine came with a little pair of white cloth gloves. I did wear them while putting the chair together and it kinda helped hang onto some of the smooth metal parts while attaching them. The gloves got snagged and got a hole in the index finger of the left hand, so they aren't super durable. I thought was a weird, but nice gesture to include them though. The Allen wrenches that came with the chair are chunky and durable, much better than what you usually get in such things. I actually kept them for a change.