Martin's apartment was fantastic. It was in a brilliant location we walked to every tourist spot from the apartment the nearest being at most 20min away. There are also a few supermarkets around the corner and some nice restaurants/cafes not far either. The neighborhood also felt safe to walk around in so coming home late at night wasn't a problem. The apartment itself was very clean and tidy, with some great amenities like a coffee machine. We didn't have the pleasure of meeting martin however he was a very easy host to get in contact with and sent through all the check in details well before we arrived. I would definitely recommend Martin's apartment for anyone planing a trip to Vienna.