But probably the most revolutionary aspect of Sheetz is their "MTO", or "Made to Order" system.
Erin and I had never heard of this concept until about 6 or 7 years ago when returning to Cleveland from NYC. We waited in the car while our friend Ezra, who had been driving, went inside Sheetz to get some food. When he got back into the car, he said "It's OK, you can be jealous...I got a shmagel!"
"A what?!" we asked incredulously.
"A shmagel," he replied, as if we would somehow understand him if he simply repeated himself.
"A WHAT!?!?" we shrieked.
"ALL SHMAGEL!" he declared through a mouthful of egg, bacon, and god knows what else.
Had we been familiar with Sheetz' MTO system at the time, we would have known that he was referring to what a layperson would call an "everything bagel sandwich". It's a branding thing--the menu also includes such items as "Shwings" and "Shnack Wraps".
Regardless of the kooky naming conventions (fryz or nachoz anybody?), the convenience of ordering through a touch screen vs. actually having to interact with the employees is unmatched, and the food itself is superb.
I recommend the pretzel meltz.