We stopped for dinner after a day on I-80 and found a relaxing place! The Powerhouse Eatery is a white linen tablecloth, comfortable chairs, good flatware, quiet music type of place, but you still felt right at home in travel clothes. There were lots of families and the atmosphere was informal but peaceful, but not loud and tacky as so many roadside places are. The staff was very friendly.
The menu ranges from reasonably priced sandwiches to high-end specials (we ordered the latter--boar chops and beef tenderloin--and were very pleased with the cooking.) The ciabatta bread is excellent and the salads fresh. We didn't get a chance to try the wine (driving) but it looks like they have a nice selection of open wines by the glass that changes with the specials.
Don't let the quirky building or the high-end items on the menu keep you away. This is a great place to stop for a break from driving across PA, and it is RIGHT off the road. It was really an oasis in the middle of long drive.