I bought one of these on Saturday, it was discounted at £479 due to an open box. I saw it was the A01, quite an older model and I suspected someone had already bought and returned it due to a defect, but I took a chance as I knew it was still under warranty. After setting it up I realised there was a minor defect, a small bright spot that was really only noticeable on white backgrounds. At nearly £500 it needed to be perfect, so I contacted Dell who have been excellent and sent a replacement out the next day. Just set it up now, Rev A05 and I couldn't be happier with my decision.