My girlfriend and I stayed 3 nights at Marielle and Tobias' place. The flat is clean, nicely decorated and very functional with everything needed to make breakfast/dinner. The location is slightly outside the centre, but it is still a walk-able distance, otherwise taking the tram is very simple. The nearby supermarkets are very handy. Tobias also gave us plenty of useful information on transport and food. A minor caveat: the room is at the ground floor, and Tobias' family stays on the floor above, I am a light sleeper and I could hear the kids running around in the morning, but again not a big issue. I would definitely book there again for a future trip!