I had a great few days at Yvonne and Alan's (I hope I'm spelling the name right) appartement. They are both lovely hosts.
The appartement itself and the room they rent out is very spacious (see the pictures in the ad) and in a nice and quite neighbourhood. The king size bed is super comfortable, the kitchen well equipped and everything real tidy. The house is close to the University, the ETHZ and the hospital and next to bus line 33 and a short walk from the tram stop Haldenbach (lines 9,10, and nightline N11). All in all I would very much recommend staying with Yvonne and Alan.