This was an interesting little hotel. We reserved a quad room for 2 adults and 2 teenagers. The room had adequate space, but was very, very dated. It was a very old building which appeared to have been renovated in the 80's, but they were not very successful at combining old and new. It was, however, clean with comfortable beds and a decent morning breakfast. They had a bar in the lobby, but I think we were the only ones who wanted to use it and the night clerk (who is also the bartender) didn't seem very pleased that he had to wait on us. Interestingly enough, on the times we met him as he was getting off work he was a very pleasant fellow. I just don't think he liked his night job very much.
Word of warning - we happened to be there when it was unusually hot and they do not have air conditioning. Do not rent the quad room if going in warm weather, the night clerk (when off duty) told us it was the hottest room in the hotel...he wasn't kidding. They gave us a fan to use, but since you can only open one of the windows in this room it never really cooled down that much.
All in all, I would stay here again if the weather was cool. I really liked being close to the museums (all within a few blocks) and high end shopping. It was also very easy to access the rest of Amsterdam via bus or water taxi.