The food is great. I've honestly never had anything here that wasn't excellent. The Italian Beef is, in my opinion, about as good as it gets. Make sure you get both sweet and hot peppers. You're missing out if you don't.
But beyond the food, the service is the best. I'm fairly new to a city, and it's really wonderful to go into a place where people are kind every single time. I went one week, and was having the worst week, wasn't sure how I was ever going to stay in Vegas... and I left Sonio's smiling. Great homey food. Even better people. I would recommend to anyone.