This really is the best way to see Vegas- from above. The rotating restaurant lets you view not only the city, but far off into the hills (which I always thought made a better view than the buildings).
Getting up was pretty easy, and it's a great way to bypass the crowds who just want to see the observation deck. By the time people had gone through the line for the floor above me, I was already chowing down.
The food is decent. It's not bad, but given the price and atmosphere, I expect some pretty good food. Fifty bucks for a mediocre meal seems like a lot, but then I'm paying for the view, not the food.