I've stayed at the following
Flamingo - good location, just average hotel but nice pool complex
Riviera - dump
treasure island - average, small pool. good location
monte carlo - average, again, great location
bellagio - one of the nicest places I have stayed.. best of the best in everything
Probably going to stay at the wynn when we go out in Oct...
Had a friend stay at mandalay, although he said it was a great hotel, the location sucks.