When it comes to Vegas, always remember: You get what you pay for.
MGM has recently done renovations, and the rooms and hallways look great. They are very much up to "Vegas standards".
However, MGM was originally opened in 1993, so some items that aren't cosmetic haven't been upgraded:
1) Such as the ventilation in the casino and rooms. MGM is very smokey and you will notice it in your hair/clothing. Also, the AC in our room took a LONG time to cool the room down.
2) The shower was a little wonky as well. The faucet would run while the shower was running, and the water had the potential to get extremely hot.
PMGM is cheaper than other hotels, so it's a good choice for someone on a budget who would still like to be on the strip.
What I did like:
1) Having an M Life card. It's free to sign up and allowed us to get a discount on Zumanity tickets. (The price dropped from $115 to $75/person!)
A lot of hotels don't offer discounts to their guests when booking through the concierge, so that was great.
This card also gives you a discount at the small convenient store in the lobby.
2) The pool area is very nice. There is more than one pool available and extras like a volleyball net and inner tubes are available for free. The chairs are comfortable and there are lots available.
3) The cafeteria. Dining on a budget? McDonald's and Nathans are some of the fast food available. They also have a Starbucks in the casino.
4) MGM is located on a busy part of the strip. There are lots of shops and other hotels to walk to from MGM.
Overall, a nice hotel worth 3.5 stars.