Overall the apartment has convinient amenities and is in a good location - close to the metro station and just 17 min. walk to Schonbrunn palace. The only problem we had was related to the hot water - it was not stable and sometimes was not getting hot. However, Johannes was very responsive and he tried to help us as much as he could at that time. Also he said he would fix this issue for future guests convenience.
If the spa issue is fixed, I would say this apartment is a good value for money!