Staying at Zina's house was after all okay.
We had some problems with the check-in because she wasn't there and she didn't respond to our messages and calls, so we didn't know how to enter in the house and we had to wait outside for almost 2 hours...
But, beside that, living there for five days was okay. The flat is pretty small as you can see from the pictures, but you can find inside everything you need.
It is a five minutes away from a metro station, so it's perfect if you want to visit the city.