I was in Vegas for a few days just before July 4, and I had a couple of meals at Carnegie Deli at the Mirage. They felt like two entirely different experiences, and I don't mean the service or the ambience; it was all in what I ordered.
The first time, I hadn't eaten in 24 hours, so I decided to go whole hog and order a Woody Allen. They weren't kidding when they tried to describe it; even with my appetite, I only managed to get about 3/4 of the way (1 1/2 pounds of meat, from what I understand) through it. The second time, I went for an open-faced turkey sandwich with gravy, and it was almost as if I had been handed a couple of slices of turkey on some rye bread, topped with turkey gravy, at the buffet; it just wasn't much of a sandwich. On top of that, the turkey cost more, although it was hot and came with a choice of fries or beans whereas the Woody Allen was just for the cold sandwich.
In case you're interested in my other stops, the only one that was particularly noteworthy in terms of the food was Cheeseburger Vegas at the Miracle Mile shops next to Planet Hollywood; it may have been the size (I ordered a double, which I think is a pound of beef) or the way it was cooked (it appeared to be cooked medium but still managed to be somewhat juicy), but it was one of the better non-gourmet burgers I have had on the Strip (not quite Burger Bar, but better than BLT or Stripburger). (Speaking of BLT, I was a little surprised they didn't make a big deal out of their first anniversary on July 1. Yes, I was the first person in line, just like last year.)