First of all, Jens is an incredible host. One of the nicest people I've met. He provided us with everything we needed.
Location wise the apartement was located really close to the city center (consider buyinv day tickets for the Ubahn) and also close to the music venues, which was a big plus for us.
The accomodation was mess but it had it's charms, the room itself was big enough since we just slept there and were gone for the whole day.
Bathroom and kitchen were fine for the basics aswell (although we didn't really use the kitchen all that much because we weren't really keen on cooking veggie). You really get more than what you pay for.
Can't reccomend this place enough, especially for this price.