I have to start with a disclaimer: I am not a thin crust pizza kind of a guy, but Grimaldi's is doing a dang good job of making a convert out of me.
The crust is fantastic -- it's not that cheap crunchy garbage you get at the wanna-be NY pizzerias, this stuff is legit. It's thin, but somehow manages to maintain a soft, chewy texture that perfectly compliments their fresh ingredients and phenomenal cheeses.
They say the secret to the crust is in the water... which is why they hired a chemist to recreate NYC tap water for the Las Vegas stores. It sounds nuts... but it worked, so I'm not complaining.
The ambiance is great, very urban and trendy (according to my wife, I don't pay attention... I'm there for the food). It's nice enough to not feel tacky taking a date there, but casual enough that you can wander in whenever and pull up a chair at the bar to watch the game. We enjoyed watching the chefs toss the dough and laugh when the new guy struggled with it.
I've been to both the Eastern and Boca Locations and both are similarly excellent. I'll be back again soon.