The apartment on the 4th floor has a nice view of the sky, the rooftops and glimpses of the hills behind. It really is pleasant.
The balcony is shallow and made me uncomfortable at this height but being able to open the doors made the room bigger and, although it also let in a lot of street noise (there are three outdoor cafes below plus a very busy tram stop and a children's play area), it let us hear the wonderful clanging of the church bells and the chirping of the birds. We found all the sounds delightful in their own way.
The kitchen is only minimally supplied with cooking utensils and any serious attempts at cooking might cause consternation. For a short stay, this is probably insignificant.
The modern look of the toilet and shower uses sliding frosted glass walls. I would have preferred more privacy, myself.
Finally, the apartment is pleasant, well located for our purposes, the host was available in case of problems and we would be happy to come back for a few days on our next trip to Zürich.