Winchell's Donuts went extinct in my area decades ago, so I was delighted to find one across the street from the Mandalay Bay while visiting Las Vegas. Relative peace & quiet away from the bustling mega-casinos and an inexpensive breakfast were just what I was after!
This particular store (restaurant?) is located in a strip mall, sharing space with a Subway and next door to a liquor store. Open 24 hours a day, and cheaper than just about anything that can be found across the street in the casinos.
As for the quality of the goods here, certainly nothing special. I had a bagel breakfast sandwich, a couple of donuts, and coffee for a grand total of about $7.50; it did the trick.