We had an excellent stay at Marcel's apartment. He was very helpful when we arrived and gave us plenty of advice but was not at all intrusive during our stay. The lifts to and from the airport are very helpful.
The accommodation is quite self contained and has all of the necessary facilities. It's been well maintained and while on the small side offers great value for money for Amsterdam. It's about 10 minutes walk from the city and we were happy to do that instead of taking a tram most of the time.