This is a solid classic Italian restaurant with outdoor dining in good weather and indoor dining, away from the tourist hordes of the Bellagio promenade.
The service is good the italian food is solid the prices are reasonable and it is very popular and has a good energy to the restaurant. In particular, the cheese plate is fantastic and the great value and the wine list has several good options under 60.
One story that is particularly worth noting about the good service: I forgot my wallet with credit cards and had no cash on me and didn't realize it until the bill came. After a few stressful moments and a call to my hotel to validate I was at least who I said I was they were extremely understanding and let me come back the next day to pay.
One hint, don't drive a large car - the one-way road leading to the restaurant is very narrow.