The atmosphere of Peppermill is reminiscent of Downtown Las Vegas' "hey day". The motif of neon lights and wall to wall mirrors (looks like deconstructed disco balls) scream "old school".
You have plenty of choices when it comes to the fare. It's quite a cornucopia / mishmash of food.
I had the pulled pork sandwich which was quite tasty, but it wasn't something that wowed me. Pork was tender and shredded, but was a basic sandwich.
Basically, I should have tried something that was more on the "diner" side (burgers, sandwiches) instead of something like a pulled pork sandwich that takes a lot of time to cook. Basically I learned not only from here, but from any place that serves "BBQ", if there's no pit and you don't smell it in the air, don't order "BBQ".
In conclusion, Peppermill is more for nostalgia of earlier Vegas with Denny's type food. It's just a smidge above Denny's, but not by much.