Machines are very tight. Other than drink services employees, when you don't see any other employees out on the floor, it's a pretty good sign that there is no need (i.e., no jackpots or payouts). Plus, if you look up, sometimes you can tell by the top light of a machine that someone has hit a jackpot, I've never seen anyone hit a jackpot, and I've been there a few times. - Not worth going to.
Pros : Great place to lose money fast.
Cons : Very very low payouts. Very tight machines. One restaurant and food is not that great.