My husband and I spent the month of October 2011 in this apartment and it was fantastic. I have no complaints. Located at Bornholmerstr and Schonehauser Allee, every convenience you need is right outside the door (restaurants/bars, banks, pharmacy, liquor, fitness centre, transit etc). The entrance and hallways in the building are renovated and clean. The apartment looks over the inner courtyard so it's very quite as well.
When we arrived the apartment was very clean and was stocked with lots of extra towels, bed sheets and blankets. We are heavy internet users and it never went down once, it was always very fast. The kitchen was stocked with everything we required (except a can opener which we let the owner know about). All appliances worked perfectly. The apartment is exactly as pictured in the posted photos, all furnishing appear very new and clean. We're not T.V. watchers but it worked, German channels only. There was also a radio/CD player and a DVD player but we didn't use them. The couch folds down into a double bed so a couple with a child would have enough space here as well, although in my opinion it is best for singles or couples.
We still live in Berlin but have moved on to a more permanent apartment. After looking around at a lot of other apartments in the city, I can say honestly that this place is of very high quality and I highly recommend it. You will have a very comfortable stay in Berlin!