I've been taking my car to Hamlin's for about 2 years now for oil changes. It's worth it to keep coming back. Not only because it's the best deal in town, but they really treat you like an individual person, not a number. The waiting lounge isn't large, but it doesn't smell like a yucky car shop. There's free wifi, a tv, bottled waters and hot beverage choices. They give me no reason to search for a difference company and now a couple of my friends go there as well. I also really appreciate the oil change reminders they send when I'm due for a visit.
Keep doing exactly what you're doing!