Harvey's is excellent. Don't know if there are many, if any, in the US. Harvey's you basically get a grilled burger as a base, you can have cheese, bacon, extra patties, etc. Then you choose all your toppings. It's the only fast food restaurant I've been to where you can get a burger the size of what they advertise. The fact that they are grilled and not heated in one of those drawers, or whatever, also makes them great.