I cannot say enough about Andy's place. We came to Berlin to kick off our summer trip, and Andy's place was our first stop for my family of 4.
First off, the location is OUTSTANDING - so centrally located in Mitte. The apartment is comfortable and well appointed with new appliances. The beds were comfortable, and the linens were soft and cozy.
The building is quiet and secure. Neighbors are nice and unobtrusive. If you have the windows open in the apartment, you can hear a bit of street noise. It isn't a major issue. The apartment itself has an amazing view too.
Andy is wonderfully responsive. We had an issue getting into the building -- despite Andy having given us clear instructions. We called her, and she walked us through the issue. It turned out that we simply misunderstood the instructions, but Andy was patient. Moreover, we left behind an iPad. Andy messaged us before we even realized we had left it behind. She shipped it next day shipping so we barely missed it.
Honestly, if this is what Airbnb experiences were like every time, I'd never stay at a hotel again.