Walking around rome builds up quite an appetite so a quick gelato as a snack is great. We had the gelato in the bottom two shots on our first night an it was fairly good. But then we were beside the Trevi Fountain and came across a gelato store I had read about in the NY Times with the most incredible ice cream I have ever tasted. The portions were much smaller but the quality of the ingredients shone through.
So if you are ever in Rome be sure to drop by.