What an amazing place to stay!
The location is great with easy access to the U-bahn, shopping, and a variety of gay bars. It worked out really well being able to walk 5 min to the subway for work, excursions, etc and then come back and have easy access to nightlife in the evenings. Near the Wittenbergplatz U-bahn is a grocery store open late and Postbank that does not charge a fee for ATM withdrawals.
The flat itself has an open, industrial feel and style that is cool and functional. It's not as much of a place to hang out all day, but it met my needs going in and out, sleeping comfortably, eating, and working at my computer a couple hours each day. There is laundry in unit. And as long as you're not shy with your travel companion, the unique bathroom design is quite cool!
The host, Julian, was friendly, easy to communicate with, and kind enough to allow me to check out a couple hours late to make my last day easier. I would definitely stay here again!