I've been coming here for a few years now every time my tire light goes off (so about, 2-3 times a year, usually at the ends of the cold season). There's one guy who almost always happens to be there and he cheerfully helps me add air to my tires without a scowl. It's great because despite being taught a zillion times how to add air to my tires, I still can't get it. This time, my tire pressure gauge was malfunctioning. Ugh. Anyway, the air is free, and the staff is great. I usually try to buy something from their convenience store in return as a thanks.
The only reason it gets one star off is I would love to buy gas from them since it's super close by, but the prices are usually some 25-30c more expensive per gallon than other places nearby.