While we didn't get to meet Alan & Kasia the company they contract with for check-ins was very responsive so check-in/out was a breeze. The apartment seems huge (especially compared to other places we've stayed in Europe), and the location is quite excellent in terms of tram/transit access. While the neighbourhood is quiet there are lots of things right nearby to take advantage of, so it's quick & easy to get back to after fun days & nights in Berlin. Highly recommended!