We went to Maggiano's for my birthday. The food was good, although I felt like my steak was drowning in gravy. It's not something I'm used to - maybe that's just how it's prepared. My wife referred to her pasta as "perfectly cooked". It's tough to please her, so that means something! The margarita flatbread was AMAZING. Hands down the best food of our entire Vegas vacation.
The service was great. Our waiter was attentive, but not overbearing. He came with what we needed, asked if we needed anything, and was off. I like that. Now, I need to say something special about the service. The table next to us was very rude to our waiter over how the sauce was presented - not prepared, just presented. He handled it very well, as did the manager.
Little tip: make a reservation. Otherwise you'll be waiting longer than you'd like.