After learning, to our dismay, that the Hotel Rosenbichl (where we had a reservation) did not have a room for us, my fiancee and I found the Hotel Fischer. Fortunately, they did have room in the inn, and we had a wonderful time. The food was delicious, the beer was great, and the place had a very authentic Bavarian feel. The only downside (which wasn't really much of a downside), was that we were the only young people staying there. Most of the guests were retirees, and so the place had kind of a low key feel--very mature. Overall, however, we really enjoyed our experience here. Indeed, Berchtesdaden was one of the highlights of our trip--especially the hike in the beautiful national park located nearby.

Very nice hotel, friendly staff. Fab salad bar every evening, and great breakfast bar.

Only downside is the location - very convenient for bus and train stations, but to get the town you have to ascend a very steep hill, and it takes a while if walking(about 20 mins? don't remember exactly, but it wasn't exactly around the corner)