Communication with Tamara is very easy as is the check-in and check-out. Tamara is flexible and have us a bunch of tips. Very clean apartment with everything you need for a short stay. It was bigger than expected. It is on the ground floor near the front door so there can be some noise. Also from the street at night, but hey ... it's a city. It didn't bother us. Take some ear plugs with you ;)
Friedrichshain is the best neighborhood, with lots of cafes, restaurants and nice little shops. Also near nice places like RAW Gelände and Boxhagenerplatz.