Lana's apartment is in a great location and is nicely furnished. We had a great stay in Berlin and in the apartment. Lana is incredibly responsive, usually answering queries within a few minutes. The one downside for me was there there aren't proper curtains in the living room, which is where two (out of 6) of us were sleeping, which meant I woke up when the sun came up. Also, Wi-Fi happens through a hot-spot on the apartment iPad. We had lots of difficulties connecting to it so my advice is to make sure you're connected and everything is working before the host leaves. Lana waived the 40Eur late check-out charged that she asked us to pay because of the lack of internet connection over our first two days.
All in all a great stay, would definitely recommend it to other guests.