We had a great time at Karin's place! Karin was very friendly and helpful, and personally greeted us on check in, giving a few tips. We had a surprise heat wave, and really enjoyed using the bikes. A few people have mentioned noise, and since the room is right against the street you do get quite a lot of traffic from loud talkative pedestrians, especially on weekends. One drunk couple decided to stop and have an argument in front of our gate, which we viewed as free entertainment :). Otherwise, the room and host were both charming, and we would love to stay here again if we return to Amsterdam.