Perfect location, just a 3-4 min walking and you are in the Stephansplatz, 2 min away is the subway and tram station.
The apt is very large and comfortable. Everything was clean and prepared to meet us.
The host is very kind. No problems with communications.
So, if you are looking for perfect historical place for stay in the center of the city then definitely recommended Griechen's place.
p.s.
in a front of the main entry you can find the coffee house, a little cute place.
Highly recommended to try the "coffee with the fresh orange juice" set. :)