Daniel's apartment was very big as just as in pictures. 3 rooms could accommodate a big company. There were also 2 toilets, though we haven't used the second one. There were all kitchen appliances. The balcony was nice also.
The apartment is on the second floor and there's a lift.
Check-in was easy. I asked for 2 keys and Daniel has kindly provided them to me.
Transport in Vienna works perfectly which makes easy moving to all places you need to be. There were 2 metro stations nearby (around 10 min walking).
Overall, my stay was very good and I recommend his apartment.