I am surprised about the complaints from the other reviews! I had a good experience hanging out here during my stay at the MGM.
This is an ARCADE BAR. That means I come here for 2 reasons -- to play games and to drink. It seems like other reviews complain about the high drink prices, but I'm not going to simply because there are plenty of other bars to go to and this is an arcade bar. Also, this is Vegas! You can probably buy a drink nearby and bring your own if you really wanted to. I come to an arcade bar to be able to play games...
Now for the games. I feel that Level Up has a good variety with a laid-back atmosphere and fun location (right next to a busy walkway), and this is really what makes it shine. Pool (2 tables), shuffleboard (1 table), and giant Jenga are great social games. Pool and shuffleboard costs $2 a game. And "Deal or No Deal" for REAL MONEY?! That means you can gamble in here too! For the size of this place, it has a good balance between game setups and having space for people to just sit down and relax.
Verdict:
This is a great place to spend time if you're staying at MGM. Or if you're a shuffleboard fan. Or if you lost too much while gambling and want to kill time for just $2 a game. It's really not bad.