I am rating this 5-stars based on my limited use of it so far. (If I find issues with it, I will come back and adjust the review.
++ The chair is very sturdy -- the square legs give the chair much better support that then typical round cylinder legs of other chairs.
++  This chair lays back farther than other zero gravity chairs I've had. Very comfortable.
++  The price of this chair (I got it on sale) was better than other chairs with lesser quality frames.
My zero gravity chairs in the past have typically lasted only two years. While the mesh and attachment of the seat to the frame is pretty much the same as other chairs, this one does have double-straps which should last a bit longer.
I am so far very happy with this chair and would recommend it to my family and friends.