I don't think I could ever give a gas station five stars, simply because it's an errand. However: this Get Go is great, especially compared to a couple others I've been to.
There are a very large number of pumps, and ample space to get around cars that are occupying pumps. Also lots of parking in the lot of the gas station in case you just wanted to grab something quick. I haven't been inside the store, but it looks pretty well-kept from the outside.
And, like the others have said, it's just so cool to use your fuelperks!