We stayed at Jeroen's apartment for 3 nights, and though we never had the opportunity to meet him, he was always easy to get in contact with and provided lots of tips on getting around Amsterdam.
The apartment itself is lovely. There was 4 of us and there as ample space, allowing us privacy when needed, with a large lunge area and wonderfully equipped kitchen. The location is perfect. Tram stop is directly outside the apartment and is 5 stops from Amsterdam central. Amsterdam is such a small city, no where was more than a 20min ride from the apartment. We were so happy and comfortable at Jeroen's. If I ever return to Amsterdam I would definitely be staying there again. Absolutely no cons!