I stayed at the MGM Grand for 1 night last Sunday. We had a standard room with 2 beds (they claim they're queens, but they are more like doubles). It was pretty small and in need of an update, but it was clean. The TV was the old-fashioned, non-flat screen kind. The beds were super comfortable and the pillows were the best I've ever had. They seemed like overstuffed down pillows. I'd like to find out what they are and buy some for my bed at home!
The pool area was very nice, if crowded. We particularly enjoyed the lazy river. This hotel seems to attract mostly people in their 20's bent on drinking and having a good time.
Full review at http://marga.voxpublica.org/2011/08/mgm-grand-hotel-casino-las-vegas-review/