The chair is very comfortable. The rollers are very smooth. A little tricky to get the seat- back in place you need to loosen the arms a bit. I recommend this product.
I am 80 years old very mechanical but could not put the chair together. I needed to bring over my friend to do it for me. The bolts were very difficult to get in the hall. The Allen branch was significant to the project. You should have given me a longer Allen wrench And not put brown stuff on the thread of the bolts
This chair fits me very well and is comfortable for long stretches. Only downside is there are no adjustments for lumbar support or armrest angle/height.