Charlotte's apartment was absolutely wonderful. It was very thoughtfully furnished; for everything I needed during my stay, it seemed like I just needed to look into a few more drawers! :)
The location is pretty great, close to an S1 stop (Fridenau) - which goes through the city center- and a stop on the Ringbahn S41/42 (Innsbrucker Platz).
Charlotte was a great host, always prompt in answering questions and ready to help, as well as great to talk to.
Would absolutely recommend this place, esp for a longer stay!