Great place, great host. If you like a good workout, you can walk up to the apartment via the stairs. But if you're lazy, there's also a nice old, vintage style elevator. Furthermore, the apartment had almost everything provided, from a blow dryer to shaving creme. Didn't speak to the host that much, because she had some visitors, but she was very nice, asked how my stay was and where I could pick up the keys. There was a paper with some suggestions for restaurants, grocery stores etc. Very thoughtful! The place was very clean. There was even an Espresso machine, with caffeine free coffee! Hope she doesn't mind I took the machine and the caffeine free cups with me...
Just kidding ;-) But yeah, great place, would definitely recommend it! Also, it's very close to the KaDeWe and I think, the main shopping area of Berlin. Also, it's around two minutes away from the nearest Subway station.
If I have to give a point of criticism, that'd be the place right next to the apartment... not gonna say what it is, you'll see it for yourself ;-)