This is a great place to stay. Very comfortable and nicely located right next to M249 bus stop.
Franz was very responsive but not very helpful when it came to recommendations for things to do in the area - after staying here, I think that is because there's not a lot to do! However, as I said, the transit connection makes getting into more interesting parts of the city very easy.
I highly recommend for a convenient, fair-priced cozy stay in Berlin's Kreuzberg area!