MGM is an awesome resort. It has everything you need all in once place. I stayed here about 1 month ago JUNE 2010. my room was a west wing king and its was just right, nothing too fancy but still a nice room with everything i needed. The bathroom was a bit small tho, and no mini fridge. but still a great room for $60 p/n.
The POOL AREA IS WHERE TO BE!!!! Lazy river, waterfalls, like 5 different pools, jacuzzi areas, and WET REPUBLIC. This is one of the best places to cool off in Vegas. only downside is the ridiculous drink prices, $9-11 beers to $13-$18 cocktails. But this is to be expected.
I gave this 4 stars merely for the pool. The casino is about average, the clubs are OK, definitely not the "IT" places, and the restaurants are mediocre, and the rooms are nice but not amazing. I would stay here again for sure to get a nice room for cheap and have a great pool!