I LAVO this place. It's one of my must visit restaurants when I'm in town. The appetizers are amazing. The kumamoto oysters are great, the Meatball, the grilled octopus, and many others. This is almost one of those places where you could order a bunch of appetizers and feel satisfied afterwards.
Our waiter recommended the Cavatelli Bolognese and it was fantastic. He also recommended the spaghetti and meatball but we ordered a meatball already.
The house garlic bread is second to none, it's nicely seasoned and it comes with a marinara sauce on the side for dipping.
Don't forget the yelp check in for the Oreo Zeppole which is like a deep fried battered Oreo.
I'm not sure how bad the wait is if you just walk in, I've always made reservations through Open Table and I've never had any issues. Can't wait to come back to Vegas to eat here again.