This place was perfect for what we needed - we were there for medical reasons and it is a very short walk to AKH (hospital). The location directly across from the train station was excellent too.
The space could easily accommodate three couples. I slept on the couch one night and it was really comfortable - it pulls down to a double bed.
It was clean and Michael's communication was excellent- really quick to respond and his tips for an enjoyable time in Vienna were appreciated.
I would recommend this place without hesitation.