I'm so happy with this chair! I have back/spine issues, so I chose this chair because of the foot rest, lumbar support, and ability to recline. It is so comfortable, I'm so happy with it. The support is amazing, I haven't had a backache yet, which is usually the case after less than an hour. I was able to put it together myself, which is usually impossible for me(I suck at instructions). The only issue I had was the arm rests were both the same, but luckily it was an easy fix, just had to unscrew and flip one around.I bought this to use support for my legs while working. The chair leans forward when you use the leg rest & you cannot lock the seat position to be ergonomically correct. Love the adjustable arms! But would not buy again!Easy to assemble following the instructions, but a piece came cracked as pictured. Otherwise, it is comfortable. However, the headrest is definitely for a tall person, it is not ergonomic for a 5’0 person looking for neck support.The screws and instructions are missing.The product description reads: "The three-level safety air pole has passed the SGS certification and can withstand 300 pounds. The five-star foot seat ensures a stable sitting posture and is very suitable for weight Heavy people use." Well, after only having this chair for about two months (so the return period is over), it has started to fail and I now find myself having to purchase a third-party replacement cylinder. I am quite unhappy about this and would not buy this chair again.I do not weigh 300 lbs., and I have NEVER had any other office chair (either in my home or at work) fail to stay at the highest height if I move about or lean to the side like this one does. I don't have time to go through the hassle of returning the chair, so I guess I'll just fix it myself.Not happy, especially for the amount of money spent on it.Comoda y muy resistente! También elegante.Left and right handrails are not the same height.Seat back not adjustable