Cristina's place is a very good base for exploring Vienna. We only had one night there unfortunately, but the apartment is a short walk to the Neubau district, which offers lots of good restaurants. It is also possible to walk to the Museum quarter and city centre very easily too. Or if you would prefer, there is also a metro stop one minute away which is also very useful.
The space is very well equipped and clean. The kitchen had some useful things if you wanted to cook too: oil, salt, and tea which are always added bonuses.
Cristina's communication before check in was also very good and we had very clear instructions for our arrival.