As a restaurant this is a three star place, but considering the history of the Peppermill, the unique old Vegas ambiance, and because this really is a diner, I went with 4 stars. For a diner, the food is pretty good. Just remember, this is not the Bellagio. This is about the nicest diner food I think I have had. Portions were huge, prices were reasonable, and there is quite a wide variety of foods to try. Chicken was kind of tough, but that is somewhat expected of a diner.
I think a visit is in order simply to support a piece of vegas history. However, after you visit you might not be surprised why Vegas has redecorated since the Peppermill first opened.