Vienna is one of the greatest cities we've been, it's impressive, gorgeous empire capital ;) but it is very comfortable as well.
And it was completely great to stay at Lisa & Mina apartment because first of all it is really close from major sightseeings of Vienna. E.g. magnificent Rathaus is just in 10 minutes walk.
Okay, and if you are completely lazy (or tired :) ), or you are already in evening dress heading to Vienna State Opera, just leave the apartment and simply cross the street to catch the train.
BTW, don't forget to book a ticket to Vienna State Opera!
Oh, and more great issue i'd like to mention. The time we plan our journey, we supposed it could be rather chilly in the apartment, because we visited Vienna in October. But we were definitely surprised how warm in Lisa & Mina apartment, two words - floor heating ;)