I think an upscale Denny's accurately describes the decor of this restaurant. Lucky for them, I would say the food is a little bit better. We actually came here twice while we were in Vegas due convenience (when you don't want eating to get in the way of gambling).
During to first stop I ordered the club sandwich. If you are ever here and order this make sure you are going to split it with someone, the sandwich is huge. As far as taste, it was decent, but it's hard to really judge when you have to eat it in pieces because it is physically impossible to eat the whole thing with one bite. The second trip here I wised up and split a pizza. It was a four cheese pizza and we added Italian sausage, onions and peppers. It was actually surprisingly good for a diner pizza.
Our service was decent both times. I would say the food is a little pricey, but I guess you have to adjust your price scale when eating in Las Vegas. If you happen to be in the MGM and want a casual/quick meal this is a decent option.