The location in the trendy Kreuzberg area across from the beautiful, historical park was by far the best feature.
We did have a few small issues that maybe had more to do with the season and city infrastructure than the space itself. Berlin had a drier than average summer, so there was no water in the shower trap. As a result, the space smelled vaguely of sewer gases unless the shower had recently been run.
We also were not able to get the heater to work on chilly nights or to dry laundry and towels, but this may be because it hadn't been activated for the cooler season.
We had some trouble getting the kitchen heating plate to heat consistently as well, so we went vegetarian for any home-cooked meals to be on the safe side.
We also had to provide our own soap and shower supplies, but this was noted in the original listing.
Again, being near public transportation (2-3 stations within decent walking distance), grocery stores, bars, and shopping was really wonderful. The decor was also very modern Berlin; not to everyone's taste but a good reminder of being in the middle of everything.