For the price I don't think you can beat this place.
The Earl's Club is amazingly good, and the condiments they have is great (even greypupon on the tables)
There Full Montagu is pretty good too, but I like the bacon and sauce combo on Earl's Club.
Great bread, fresh ingredients, always busy.
At this time the location is open 24 hours, and yes it's still very busy at 2am. There deserts are also very good.
Sandwiches are around $6, which is very good for their quality.
Con: bathroom is in the casino and a bit of a walk to get to.
You can call ahead for an order as well, which might be good if you know what you want already.
I'm getting hungry just thinking of the place, will probably go everytime I go to vegas