L'Orso 80 was, by far, the best dining experience of our whole trip. We could tell that their reputation preceded them by the lingering patrons waiting outside the door for the dining room to be unlocked. Within minutes of the front door being opened, the entire dining room was full.
The waiters were friendly, fast and efficient--a combination hard to come by without leaving you feeling like the service could have been better, but I don't believe it could have been. We had prosciuto and melon that melted in your mouth, fritters of risotto and cheese (warm and unleavened), the antipasto mista which consisted of mushrooms, olives, artichokes, fennel, celery, eggplant, zucchini and roasted red peppers then a surprise of succulent meatballs and a perfect red sauce. For our entrees we had Tagliatelle Scampi with shrimp, prawns and clams as well as fettuccine with butter and fresh Parmesan. The food seems endless and there wasn't any room for dessert (although I'd wished we'd had). It was definitely worth the pacing wait outside the door!
I have to mention that it's difficult to find located just off the Piazza Navona and the exterior is indescript with no menu to peruse but you will be glad you spent the effort seeking it out.