This trip to vegas for work I've found myself stopping at Fortuna for everything from a mid-afternoon pick me up, dinner and 50% bottle of wine ($9.75! and the opened it & gave me a glass to take upstairs) to take back to my hotel room, to a croissant and latte for breakfast. Service is always fast and efficient .. even if there is a line, you wont wait long. Though, the employees aren't always friendly... just all business.
So far, I've enjoyed my cupcake, the roast beef asiago sandwich, my lattes, and their interesting wine selection! Definitely the only casual dining place worth visiting inside this Hilton.