My wife and I, and our 8 month old son, were visiting friends in Germany, and decided to make a short visit to Amersterdam for a couple of days while we were in Europe. Our time at Peter and Katja's little blue house could not have been more pleasant. The space is well built, tastefully appointed, comfortable, and convenient. Peter and Katja are warm and friendly. We were welcomed in when we arrived, and they provided some tips for finding a quick dinner our first night, which worked out very well. Peter's birthday happened to coincide with our second night in Amsterdam; he advised us that there would be people coming over to the main house (in front of the little blue house) to celebrate, and he invited us to come over for a drink. All guests were quiet and respectful - the baby slept through the night without waking.
It depends on what you are after, but in the opinion of my wife and I, the little blue house is the perfect balance when seeking accommodations for a visit to Amsterdam. The location is convenient to the city center, via a ferry that leaves the NDSM wharf (~1 mile away) every 30 minutes, and yet the location is in a quiet, peaceful neighborhood of single family homes. The location is easily accessible by automobile, and parking is free (you couldn't say this about any location in the city center).
I have already recommended the little blue house to friends in Germany who were considering a visit to Amsterdam. I would recommend staying with Peter and Katja to anyone.
Cheers yall.