Second stay in one of the apartments of those two great hosts. This one was also like shown on the pictures, clean and cozy, big kitchen and a good location with all public transportations within walking distance.
Fast and easy communication.
Normally pretty quiet, but we had some guest neighbours, who didn't pay much respect to sleeping times. But that has no impact on our genuine recommendation, since that is nothing the apartment or hosts can guarantee for! So, if you wanna visit Vienna, you're right with this one!