Surely Kathi's apartment deserves a very special review! It's difficult to find the right words but describing simply: it was one of the best places we ever stayed at. Even better than on photos, evoking very cosy feelings (I believe the Dutch word 'gesellig' would be appropriate here), almost in the center of the city (1 U-bahn station from the main train station) and in the quiet neighborhood. Many supermarkets are within walking distance, a nice cheap bar - as well (although we didn't have time for it). 300% recommended. We'll surely book again visiting Vienna next time! Thanks a lot for your hospitality and artistic mood of the place.