We were very comfortable staying at Diewert's houseboat. It is a nice sized room with a modern bathroom, queen bed (hard to find in many places at a reasonable price!) on the second floor of their home with a separate entrance, so there are stairs outside to get to the room. You can hear the water in the canal at night and the parakeets outside in the morning. Very serene and quiet, albeit a little further out from the city center, but close enough to public transport. We enjoyed meeting Diewert and would definitely stay at his home again.