I had a post about a week ago that I had purchased a 27 iMac along with a MacBook Air. Well today I took the 27 iMac back to the store and they gave me a new one, hardly a question was asked. They just wanted me to show them what it was. There was something lodged behind the glass, just about dead center in the screen and I just could not get used to it even though it was very small. As soon as I turned it on, the guy I was dealing with said "yep, that would drive me crazy". I thought I might be able to live with it but decided I could not. Very happy with the service they provided.