It was an absolutely great experience to stay at Sarah's apartment. It looks exactly like the pics - recently renovated, tastefully furnished and very spacious! It has really all you need (and even more than expected - like a hair straightener). The location is perfect - you can walk everywhere from the apartment. Public transport is very close if you want to explore something a bit more outside of the center. I would only recommend bringing ear plugs to prevent waking up because of the construction. With ear plugs it was no problem at all.
Sarah was a fabulous host. She gave us a lot of great tips (cafés, bars, restaurants). Communication before and during our stay couldn't have been better. She is super helpful and accomodating. She was also very flexibel when organizing check-in and check-out.
I would definetely recommend staying at Sarah's apartment.