I prefer Sheetz to GetGo, but Sheetz is nowhere on my trajectory. GetGo is almost always crowded, and parking can be a bummer. However, it is the least crowded location I've been to.
The cashiers here are generally super sweet and pleasant. When they are rushing, they get cranky but so would I.
The store is typically clean and stocked with quick snacks. I love their fountain sodas. Their machines work and have the right amount of syrup and fizz.
If you have rewards, you can get some amazing fuel perks. This is probably the best reason to go to GetGo!
I go here often, and I will probably continue to for sometime! I recommend it if you are in the area.