My girlfriend and I rented Anton's apartment for five days around Christmas, and we really enjoyed the apartment which delivers what you expect based on the pictures. It's nice and cosy, with the only minus (for us) being the use of perfume, which we found to be quite noticeable.
The neighborhood is quiet, but there are also plenty of cafés and bars within walking distance of the apartment.
We bought day-cards to the public transportation and found it to be an easy and efficient way to get around Berlin.