My girlfriend and I had an excellent trip to Berlin, most definitely helped by Henrik and Sven's hospitality and apartment!
We were welcomed at the rental by Henrik who gave a us a nice quick run-down on the property then left us to get on with our trip. The apartment was great. Very clean and it had everything you required to be comfortable and recoup after a long day sightseeing and drinking! As the advert says it is very much one-of-a-kind, encompassing a great retro feel. Furthermore, the area is great. Very cool places to eat and drink and a great vibe in general.

Also, throughout our visit Sven and Henrik gave us an insight into what to do and see in Berlin as well as their top eateries.

To summarise: great guys and a great apartment. I would definitely stay there again!