My family and I (a group of 5 adults) stayed in Tania's apartment for 3 nights and overall it was great. We would repeat again for sure.
The location is pretty convenient as it is not far from the center; basically, in Zurich you can get anywhere waking . However, there are a couple of restaurants-pubs underneath the aparatment, and because of that, on the weekend there can be a bit some loud music going on. (It happened to us on Friday's night). Luckily, the party ended quite early so it was not much of a problem.
There are many parkings around, so worrying about where to park the car should not be an issue. The apartment's facilities were on point as well. There's is a proper kitchen, spacious and with lots of utensils, so cooking there it's easy. In regards of the sofa bed, it is not that unconfortable, and it does its function.
function.