Staying in a houseboat is really a special experience. Our time in Amsterdam was really intense, with much walking around the city and enjoying the boat with the kids (who, of course, loved the adventure). The boat is very well located, right opposite to Anne Frank's house and in a great neighborhood (with good restaurants, shops, and markets). Communication with the host was perfect!
The only negative things we would like to note were relative to cleanliness and maintenance. There was a broken curtain; since the channel is very busy with tourist boats, at moments we lacked some privacy due to this issue. As to housekeeping, there was some dust on the lamps and curtains and molds on the bathroom tiles.
That said, we would recommend Emma's boat as a good option for staying in Amsterdam!