I stayed there Last April for a business trip. This hotel was a very old castle which has been renovated. Only 33 rooms over there with different size and style. The best view is the "guard house" room. The room is actually comfort, clean and connected to the wifi. But the problem is, when midnight comes, i can hear the strange voice..like a baby was crying, a foot steps from the ceiling, and a sound like a knocking on the window :)
Despite of that condition, the hotel is excellent! They serve good breakfast, have a good view of surrounding and friendly staffs. You can walk along circling the hotel and then you can find a very good view of a valley with typical german houses. You can also find a gallery which have a picture of Haigerloch. The owner of the hotel is the same owner of that gallery. If you have an opportunity to visit St. Anna church, you can get a short brief of Haigerloch's history.