If you are buying this because it of the weight rating, do not. The chair cushion is horrible and when you sit on it you can feel the metal below it. I currently have a true chair with a large weight rating and it is excellent. Someone else who sat on the cushion said the same thing and he is way lighter than the rating. So, if you are over 300lbs, look for a different chair. 
Also, be careful, because I didn't know about the cushion before I put it together, Wayfair won't take it back as it needs to be unassembled. Not sure how you test a chair before it is assembled but policy is policy. Maybe my seat cushion is flawed but I don't recommend taking the chance. Zero stars if I could.