We didn't get to meet Galina in person, but her partner checked us in.
It is a nice flat on the 3rd floor. Host lives on a lower floor.
We had to checkout at 3am for a flight back home.
The place is very close to Schönefeld airport, so it is perfect if you have a rental car.
Access to the flat requires to climb 2.5 floors worth of stairs. We had no problem with that.
It wasn't easy to get the kids to sleep early though, because the windows do not have any shades, just lace curtains.