This is for the one in St. Mark's Square, although I'm sure it's the same product for the one in the food court just off the casino.
I got the Limoncello gelato, which was ok. The gelato was lemony without tasting like artificial lemon and was kind of creamy. It's a little overpriced for the amount that you get, but that's half expected from anything on the strip.
I may give some of the other flavors a try at some point in the future.