Foods great and it comes very quick. My husband and I have never had complaints about the food.
You do have to get there early or there will occasionally be a line - especially weekend mornings!
They do try to sneak in up sells (for example cheese in your eggs) without mentioning costs. But overall the waitresses are friendly, warm and they stay on top of refills.
The decor is always great in wimpy's diners, they're entertaining, great convo starters and a lot of fun.