We stayed at Karolina's place for 3 nights and really enjoyed it!
The house is spacious and you have everything you need. It was pretty hot in Zürich (about 30-35 gedrees) but the house was cool. We swam every day at Savera Areal. It's also very convinient to reach city centre with the tram.
Karolina gave us a lot of information about the city and facilities.