i went for two weeks, visited family and stayed at my great grandmothers house.
i ate everything... but be wary of "home-made cheese"... we went to a restaurant that was supposedly famous for their cheese.... but it was like cheese pudding... and it was fizzy... imagine if you combined cheeze wizz, cottage cheese, 7-up, and pop-rocks together and then tried to eat it.... none of us could eat more than one small bite... its still, by far, the worst thing claiming to be food i have EVER put in my mouth.
we were in Gelnhausen, which is near Frankfurt in south western Germany. i have no idea about the rest of the country, but that area was very nice.
i would suggest staying somewhere in the Rhineland.. that is.. near the Rhine river... its very beautiful, and i would DEFINITELY suggest looking into a tour of it, they have lots of boats that travel up and down and there are castles and fortresses EVERYWHERE... i was 13 years old at the time and i tried to take a picture of them all as we traveled down but i ran out of film because there were so many!!
also they have "spa towns" that are very neat... we visited Bad Orb... look up some info.