We enjoyed our stay at Teresa's place tremendously! Everything went very smoothly, from the great communication up front, to the given information upon arrival, reception of the keys etc. The flat was very clean and inviting and her boyfriend (who is around sometimes) was very kind in showing us how things worked and giving us some great tips on what to do and where to go.
The flat is a bit far from center (about 20-30min) but there are frequent connections til late at night, and for the given comfort that the flat offers I would not count this as a negative point!
Also, even if the house is located on a rather busy street, the flat itself is very quiet, you don't hear a single thing in your room.
If we ever go back to Berlin, we'll try to stay here again for sure!!