Pablo is very kind, welcoming, and easy to communicate with. I didn't get to chat much with him because I fell asleep almost immediately when I arrived, and then I was busy doing things in the city during the 3 days I was there. But he appears to be an interesting person to talk to and I wish I would have had more time to chat.
The place itself is as described. The room is perfect for one person travelling alone. The bed is comfortable and the whole place is clean. It is very easy to get to public transit that will take you all over the city in no time at all. Alexanderplatz, for example, is only about 5 Ubahn stops away. Kreuzberg is an awesome and multi-cultural neighbourhood and there are plenty of shops and restaurants nearby. I was there on a Saturday morning and there was even a little pop-up market with fish, vegetables, etc. in the park a minute away! I would suggest bringing earplugs if you are a light sleeper. The heating system in the room goes off periodically throughout the night and can be startling if you are awakened easily. If that is not an issue for you, I highly recommend this place.