We got a pretty good deal for this past weekend, so decided we owed ourselves another Vegas trip. The MGM is a pretty great place to stay - always clean with a great casino and decent cafe. Our shower broke this past time around (constantly flowing, almost OVERflowing) and we placed a call to maintenance. They were there in about 20 minutes and fixed our problem in about 10. Pretty efficient, and nice to boot.
The rooms are perfect for 4, but pretty packed at 6 (tried both scenarios). The pool is a reason to stay here alone - the lazy river just doesn't get old. It doesn't really matter how hot it is (try 109 this past weekend), the lazy river is a perfect way to cool down. The other pools kinda suck, but it's okay. The River will never fail you.
BUT DO NOTE: If you're checking out at 11 (especially on a Sunday) TRY TRY TRY to leave earlier. There will be a line and you'll end up on an elevator going up just so you can go down. It took us about 15 minutes to get on an elevator and I'm pretty positive that wasn't a bad wait compared to some.
So come prepared. Drink. Relax. Enjoy. Or just drink. Up to you.