Tina's apartment is located in one of the coolest streets in Berlin, lots of bars and restaurants just in front of the door. The apartment itself is quiet (because its in the back), clean, and beautifully decorated! We (group of 4 women) really liked our stay there, it is a great place to start exploring Berlin.
The communication went very smoothly, Tina replies quick, and HP, the local 'host' is a cool and nice guy as well ;-).