When I got this chair and assembled it was alright initially, but as time passed it did not better. What I don't like about it are as follows........
1. The back started loosing up to where I tried to tighten the screws no improvement
2. The generic lumbar support started to tear after 3 months
3. The arms are wobbly and unstable regardless of how I tighten them. 
4. The chair is on the bare floor and the wheels struggle to move.
5. The arms are not stable and wobble regardless 
 This chair is not worth the cost.Would never get again