Jens and his wife are the sweetest people you will ever meet. They are very friendly and will help you with anything you might need. They also have a very cute dog.
The place is a bit further from the center, but we did not find that problematic at all, since the Berlin S-Bahn and U-Bahn is everpresent.
What we found quite fascinating is that a neighbourhood as beautiful as Jens’s is actually an ex-DDR prison. The area is safe and peacefull, ideal for a long and calm sleep.