This is a great little studio apartment near the university. Both the bed and the sofa bed were comfortable, and the apartment suited us well for the 4 nights we stayed in Zürich.
It's about a 15 minute walk downhill to the city center and old town, and 6-7 minute walk to the closest tram stop, very convinient!
The apartment is up a decently steep hill, though, and you should be in decent shape if you're planning on only walking while you stay here. The walk from the train station is pretty tough if you're carrying luggage!
The apartment was great for the two of us, and I would certainly recommend it! Sebastian was a great host, and check in and check out was a breeze.