Location: Excellent, one bus station (100) in front of the building that takes you to many places (Zoo Garden, Cathedral, Brandenburger Tor, Alexander Platz), Zoo Garden has a train to the airport (SXF), places to eat, supermarkets, pharmacy and so.
Place: Amazing, for 3 persons or couple just great, good kitchen (full equipped), washer machine, good bed, TV. They gave us towels, sheets, everything. Simply a 5-star Airbnb.
Host: Gustavo is a nice guy, I didn't meet him personally but he was always willing to help and answered every question in minutes. Who received us, equally amazing. As the place, a 5-star host.
If you go to Berlin, this is your place. Period.