Ive had it for about 6 hours now and the back gets so hot. Im running a Windows 8 VM in VMware fusion and its installing updates. My legs are burning. I also have the rMBP 8/256 and it never even gets warm. I do like the bigger screen and extra mem/quad core but I've never felt a machine ever get this hot. The fan does come on so I don't think its defective. I show the GPU at 162F. For 2599 this is the hottest piece of junk I have ever bought. All that is running now is a VM installing win 8 updates. its going back thursday. Complete garbage from Apple.