It could have been a nice stay, but issues with Sandra made our holidays uncomfortable. The appartment in itself is nice, even though the walls are slims so you hear a lot from the other appartment. The shower is very small, but given the comments we were expecting that. The main issue was the troubles we had to communicate with Sandra : we never met her, as everything is delt by an appartment manager that does not speak any other languages than Russian, meaning that when an issue appears, it is impossible to deal with it clearly.
That's what happened to us : we lost the keys, which is completely our fault. We acknowledged that so we offered to pay for them by bank transfer. We were then forced by 4 men to pay for it by cash, against our will. These 4 men were waiting for us infront of the airbnb at night, it was scary.
The appartment is correct and in a good neighbourhood to visit Vienna, but given how the "key lost" situation was deal by the host, we do not recommend this airbnb.