Very good location, we did everything by foot : 10 minutes away from the train station (indeed quite a few steps, but allowing to get a very good view, so to keep in mind but not an easy and should not be the reason not to chose the place if you can walk without issue, might be worth taking the bus or tram if you have heavy luggage though). Very close to the nice walk along the Limat.
About the appartment : great view (stairs to access the area are worth it) , in a nice and quiet location, still very close to most viewpoints in the city. 2 room of decent space, with good linen and beds; comfortable living room. Bathroom separate from the toilets (not 2 bathroom).
Overall great, very convenient to have the keys in the box. Only issue for us was that unfortunately the heating system in one bedroom was not working and no solution could be found during the week-end of our stay, so we had to put a lot of layers to sleep. Hopefully just an unfortunate incident that should not happen again.