I went into the apple store to look at the 27 inch imac. I had never seen it in person. It was beautiful. My sister who is a windows user was with me and she goes wow id love to have one of those on my desk. Without even looking at the price she pretty much guessed what it cost just by the build quality and design. Anyway my sister wants a mac now after looking at the imac. The floor model we looked at was perfect. I played around with it and there was no image retention that I could see. There also was no yellowing or any such thing present. The floor model was perfect really. No dead pixels nothing. I dont get where people say the floor models also had problems. The one i looked at was awesome. I have to say its also much more impressive in person then just looking at a pic online.