Staying in a windmill was amazing!!! Roel was very hospitable and had a good breakfast ready for us in the morning. The location was good too; took about 25 minutes to get to central station from the tram (which is way easier than the bus and train BTW).
We thoroughly enjoyed our time.
Unfortunately, we only stayed a night, so didn't get to see much of Roel, but if you book (assuming from the other reviews) it sounds much more pleasant to get to spend time with him in person.