Max's place is a great stay for a trip to Berlin. It's very close to the U Bahn and therefore only a few stops away from Zoo Garden, with onward connections to all of Berlin.
The apartment itself was very clean and well furnished. The instructions and key collection was easy, which helped as we arrived late after a flight delay. The apartment (5) was towards the top of the building, with a lift access for those not wishing to climb the stairs.
Would definitely recommend staying here