Tania's place is great! Nice spacious bedroom and living room/kitchen, and in an absolutely wonderful location, within easy walking distance of anything in District 1 (just 2 minutes from Münstergasse and about 15 minutes to both the train station and the old botanical garden, for example).
Tania was also a fantastic and very accommodating host. Our flight got in at about 6AM and, although the official check-in time is 3PM, Tania said that nobody had been staying there the night before and we were welcome to come to her place as soon as we got in, which was a huge help. She also replied to questions very fast, even on a holiday.
We'll definitely stay here again if we're ever back in Zurich.