MGM is like one of the classics of the strip. I remember coming to Vegas as a kid and amazed by the grandeur and greeness of MGM. To me it was the creme de la creme of hotels back in the day. While it doesn't have the wow factor like Bellagio or Cosmo now, it seems to be one of the hotels you always cruise through for a photo op with the gold lion, boxing matches, cirque de soleil KA, and the lions habitat. I've also checked out Crazy Horse Paris here, which was decent. See my review ;-) Otherwise, like others have said, the hotel is pretty standard with its casinos and restaurants.
Though I've only stayed in the deluxe rooms and queen bungalow suites. These rooms smelled either old and moldy or like stale cigarettes. Even though I requested non smoking rooms. I don't know why these rooms are still going for over 200 a night. These are worth more like mid 100s, bc they're kinda old. I heard the remodeled west wing rooms are better. So I recommend getting those or even those fancy shmancy sky lofts if you stay at the MGM.
I will say the lazy river and Wet Republic is a-mazing. Def. check this out if you are staying here or even if you're not!