Love the QuikTrip. Sure, it would be nice if they were over the border, which would make them a good twenty cents cheaper, but what can you do about that?
The location is solid, and allows you to get in and out quickly. If you something more than gas, they have a nice inside, instead of a shabby convenience store, and the QT kitchen has all sorts of goodies, but generally I just grab the gas and go - it is quick (er, quik), after all.