ACCURACY: the apartment was just as described and depicted. We were two families and we could pretty good spread between one bedroom (2) and two bedrooms (2+3) separated by the kitchen.
COMMUNICATION was just great: quick, to the point and with a good sense of humour. I find Igor a very open, polite and helpful host. It was pleasure to let him know, even though only virtually. Thanks a lot Igor!
CLEANLINESS also perfect. All was very clean and most of things even brand new.
LOCATION very good regarding to the public transport and supply possibilities: underground and trams stops a few minutes away, so we could reach the city centre very comfortably and several grocery shops nearby, so we could buy all we needed for our short stay. We spend most of the time in touristic parts of Vienna, so I cannot say anything about the direct surroundings.

CHECK IN was just perfect and very modern! We just got virtual instructions and our personal access code. I loved it!
VALUE: as for Vienna I think it is a very good price, for this district it is also good / reasonable.
OVERALL, it was a very good experience and I would recommend Igor and his apartment for those who want to have a good starting point for exploring touristic parts of Vienna.