Not terrible, but not the best either. Good for a quick and easy fix since there is one in practically every casino.
A slice will run you about $8, a SLICE. You heard right. Back home I can get the entire pizza pie for that price. To be expected in a casino, though. I had the tomato basil slice with a garlic knot and soda for $14. Not too bad. Was a filling dinner that didn't break the bank.
If you're looking for a good on-the-go pizza joint on the strip, I recommend Five50 at Aria.