Michael is an extremely lovely host. He is very quick to respond to messages, and communication is flawless. He took time to explain how the transit works as well as what are some must see attractions. He also provided us with a map and explain where the near by restaurants and grocery stores are.
The apartment is very spacious and clean. It has all the amenities. In addition to this, it is centrally located.
I would reccommend the Heliodor apartments to anyone planning to stay in Berlin.