A group of 8 of us stayed at Alexander's early November, the apartment was wonderful and served as a great base for us whilst we stayed in Amsterdam.
The apartment is close to everything and Alexander and his house mates were wonderful hosts. Th PS3 proved extremely popular with the boys in ou party also!
They even went out of their way to put up party decorations as we were in AMS for my birthday.
We definitely would stay at Alexander's again and will recommend to friends.