Loved the houseboat...it's spacious and tastefully decorated. Michel and michela were extremely helpful. Michela met us at the house and explained everything, which was extremely helpful. The boat really adds an enormous amount to the experience...it's very easy to pilot, and we took it every morning for breakfast. There's ducks and swans all over the lake, and we even got lucky and saw an otter. It was magical to see prague from the river.
They leave a local cell phone for you to take around prague with you, which is amazing, and every time we had a question they either picked up or called back immediately. They arranged a taxi from the airport, and contacted us the day before we arrived to ask if we needed one, which was really going the extra mile and made us feel very welcome.
The only issue with the place that we had is that the bed has a very thin mattress, and you can feel the wooden slats poking through. However we solved the problem by taking the mattress from the lofted bed in the next room and putting it on top, which made the bed comfortable. It's possible that they may have fixed this issue by now, as they said they were unaware of it and thanked me for telling them.
The other thing worth mentioning is that to get to the house you must go down some very steep and uneven stairs. If you aren't young and strong, this may cause some difficulty, especially when carrying heavy luggage.
We are very happy we picked the houseboat and would definitely stay there again.