Fabulous place. If you enjoy crazy lighting this place is for you. The whole thing is done in a wonderfully eccentric style. Fall asleep in a choice of lighting colours, as a glitter ball spins to its own spotlight in the corner, or enjoy water effect lighting while in the sunken bath. The style fits with Berlins eclectic nature and love of recycling in all senses. Although a little way out from the centre, it's quick and easy to get in by bike or metro, and means you have a very quiet neighbourhood to come back to. There's a nice wine bar opposite, and a beer garden round the corner as well as several great breakfast spots on the same street. Overall loved it, and Frank is easy to contact and very responsive to any questions.
One tip. Hire a bike for the whole time, as the apartment is in a courtyard where you can lock it up with all the other bikes. It's a flat city and ideal for cycling