I had to return the first one because of a major bow and it being far from flat. I received the second one which has a ever so slight bow but nothing I can't work with. Also, the second one is also much much smoother than the first. Go figure! I was a bit frustrated at wondering how the defective item could've been shipped in the first place not to mention I was concerned about what the condition of the second one would be. I must say the return policy is seamless. I want online, printed a return label and I received a new item the same day I shipped the old one back. The return couldn't have been any easier. Its because of the seamless return/exchange that I give it four stars.