I came here a couple of times while staying at the Tropicana this week. Overall, it's everything you would expect from an in-resort snack bar, but I still found it to be a bit overpriced. A couple of small scoops of gelato will run you $7, and the gelato is only okay. You can actually get more for less over at the Bellagio.
The self-serve frozen yogurt is a better deal, at $0.49 an ounce, and there are some interesting flavors to try (coconut to peanut butter to cake batter). I guess I never really understood the fro-yo craze. Everytime I eat it, I just wish I was eating ice cream instead.