Great place, great hosts, very much like described :-)
I highly recommend Boris and Andreas's apartement. It is right by Westbahnof, close to shops, transportation and services which makes everything so much easier. Direct access to most entertainment on metro line U3 and streetcar line 58 and 6 is a great asset. The neighborhood's calm and yet close to animated places.
Check in and check out are made very easy by the hosts, the apartment is luminous, spacious, well furnished, neat, and has everything to make you stay comfortable and worry free.
Boris and Andreas were available and responded promptly to messages. They both showed care and hospitality which is greatly appreciated.