I LOVE Dunkin Donuts. Do I think they have the best doughnuts? No! Every time I come to Vegas, I always make a stop at Dunkin because there aren't really any locations near where I live.
Service, the service is fairly friendly and efficient. You get what you want, you pay, and you're out. I like that.
I always come for their Keurig K-cups, they have a more robust taste than their regular packaged coffee.
Back to the donuts. I like that they have seasonal flavors like pumpkin. Their donuts aren't overwhelmingly sweet. The donuts are a pretty good size, so you don't feel too guilty for having 2 or 3 with your cup of coffee.