I think this place is a little overvalued for the quality of the stay... We ran into a few problems such as the bathroom being quite unclean when we first arrived, the bedsheets smelling like they hadn't been washed and hot water running out in the shower (this was a major issue!!!)
Ari is nice and provides some help but I can't say he went over and beyond to help us.
If you are only staying in Vienna for a few nights and need a small, quiet place to stay with a good location, this place might benefit you!