The best pizza I've ever had in my life. Not an exaggeration. I had it last year in Vegas, and went back a few weeks ago just to see if my memory was correct. It was indeed.
My friend and went shopping the next day and came upon another Grimaldi's at the big mall nearby. So we had it yet again. Yup 2 days in a row. That location wasn't quite as good as this one at the Palazzo, but still great. This location however is stellar on quality.
I can't disagree with someone on taste, since it's subjective- but to the people that say they've had better pizza...for the love of god tell me where that is. No words, just go. Oh, and don't go all fancy. Just the pepperoni. Keep it nice and pure.