Overall, this place was great. Christian and Jana were the perfect hosts. Very organised and welcoming on arrival, with lots of information, left me alone until departure, and gave contact details if there were any issues.
The apartment was wonderful. One of those great old Viennese places with high ceilings, sweeping entrance stairs, big old doors, and tiles and wood. Unlike some of the old places it was well maintained, with double windows, and everything worked. It is exactly like it looks: a big yet cosy living area, bedroom with a good desk next to the window that was perfect for the work I needed to do, fully equipped kitchen, nice bathroom, and space to keep stuff. C&J have furnished it just right, and it has a good feel. There was a huge TV, which was great since the World Cup was on, but voice controlled - my badly accented German struggled to work it, until I figured out the language settings!
It's in a nice area, with nearby restaurants, cafes and a supermarket. I can't really comment on the restaurants, since with work and the World Cup I didn't try any - but they look pretty good. Good breakfast at the traditional cafe on the corner, with 10% discount vouchers from staying here.
It's near to the 5 Praterstern and 39-42 Schottentor trams, and a 10-15 minute walk to the 4 and 6 U-bahns, which suited me. The street is quiet, there are plenty of shops and eating options, and the area has a smart local/working look and feel. Live like a local, rather than a tourist.
This was a fantastic place to stay and I would definitely look to stay here again.