We stayed at Jan's place for 7 nights. The place is lovely, clean and spacious. Perfect location, just close to everywhere and walking distance to Heineken Museum.
We didn't meet Jan in person, but everything was well organised and Jan had been very informative and taking care of us to make sure we were doing fine, that's very sweet! I am also impressed with a very handy and detailed house manual.
I had great time staying at Jan's place as well as Amsterdam. I love every bit of this apartment and highly recommend to anyone who is going to Amsterdam!