I chose to eat at Allegro because it was reasonably priced and right by the theater to see La Rev. I have to say, I was very pleasantly surprised.
This is a classic Italian restaurant. The food was just excellent. I found it even better than Sinatra's next door, for far less money. I had the lasagna. It was as good as I have ever had it.
Service was great. We had tickets to the show, so dinner came out fast, but not rushed. Even talked to the head chef, who was a very nice guy.
If you want a nice and casual Italian meal for a descent price, I think Allegro is a great choice. It is better than many of the more famous Italian restaurants in Vegas.
Highly recommended.