Great stay in Wien, recommended 100 %. Apartment no.4 - one bedroom with bathroom and extra big bed, wc separate, one livingroom with couch+open kitchen. Very clean, comfortable bed, enough amnities for some days, big space, easy check in with code, parking inside the yard, very quiet and clean neighbourhood, bus station in front of the gate ( 10 min bus to metro ), 5 min walk to Schonbrunn park ( upper part ).
One recommendation for this apartment - shutters for bedroom windows it would be great - the window is in a big boulevard and there is some noise and light during the night. This does not apply for other apartments i guess.