Some very small things:
Pfaffenheim doesn't have many services and you need to go to the nearby towns and villages to get even basic services like restaurants (which are open), cafes, grocery stores, etc.
It was somewhat annoying that there was no hand soap in the toilet or paper bin in the room (there was only a very small trash bin in the bathroom). Otherwise, the room was very nice.
The sound insulation is not the best. We had a rather noisy neighbors during the first night.
Nice room, friendly hosts, excellent breakfast, playground and toys for kids, free parking and wifi, nicely decorated room. All in all, a very nice B&B with excellent value for money. We can certainly recommend it.