We stayed at the Gastehaus Flemming in 2002 and, again, in July of 2010. We had two rooms this time and both were spotless and nicely decorated. The breakfast is hearty and the grounds are delightful. (See my photos and you will know what I mean.)
The water in the shower was always hot and the water pressure was good. There was a hair dryer to use. The beds were comfortable and the bedding was nice.
You can get water, wine or beer from the fridge on the main floor. Beer was about 1,50 euro, if I remember correctly. There is paper next to the fridge and you just jot down how much you owe and pay when you leave.
Our only complaint would be the street noise. Since you have to keep the windows open (no air conditioning), the street noise can be a bit much at night, although we have had much, much worse noise elsewhere.
Some people have complained about Frau Flemming. She does come off a bit cold and unfriendly but at the end of this most recent visit, she and her husband spent some time talking with us and we saw a very friendly side of her that we hadn't seen before.
NOTE: They don't take credit cards and you probably won't be told this when you book on-line (we weren't.) Prepare to have cash on hand or you will have to run to the ATM in the town square.
SUGGESTION: Take the Night Watchman's tour at 8 pm (in English.) It is WONDERFUL!