I stayed in Johan house with my family for a week! The house is really cool and comfortable, the neighborhood is really good and there are a lot of kids to play with if you have young children. It's not so near to the center, but once you've rented a bike it only takes you five minutes to arrive to the station.
Johan and Ilona are easy to contact, they always answer in the following 24 hours.
I recommend this house, it's perfect for families and to visit the city staying in a quiet place and not into the noisy center.