I only recently started coming here to Snacks religiously in the past year when I've been staying here at the Bellagio. It's a hidden gem right next to The Bank and the sports book and it's a great place to get great food. The food is relatively affordable (for Vegas) as well. Great alternative for those that are looking for a quick bite.
Once you get in there are 3 tablets on your right where you can order. Those that are less tech savvy might take a little longer to navigate through the system but also finding where certain dishes are might take some time as well. Once you have completed your order a receipt prints out with a bar code that they scan later on at the register. After you pay they give you a pager and then in about 5-10 minutes later you'll get your food ready to go. There aren't many tables in the restaurant area itself but it also depends on how busy it is.
The sandwiches are really good here. I've tried the Big Tuna Burger as well as the Katsu (Chicken covered in panko) sandwich. Can't go wrong with either. The Snack Fries with Egg is something that's worth trying, it's fries with gravy and meat and also with an egg on top.