We had a great stay at Karin's place. Her houseboat is located perfectly, calm but not remote, close to the beautiful Vondelpark - so we could always stroll home after touring the city and enjoy the cozyness and privacy. We didn't meet personally, but messaged Karin on a few occasions and she always responded fast and was very accommodating. If we come to Amsterdam again, we'd definitely think about staying over at her houseboat again.