So Georg's place is just like the pictures. It's about a 3-5 walk to the metro station. If you are traveling to Vienna by train (Wien HBF) it's just 6 stops by bus 13 A. There is a supermarket (Billa) 2 mins away and a cheap Chinese food joint just down the flat in case you want to try :) They do a good 5 euro fried rice :).
It's about a 15-20 min walk to the Opera house and everything else (Hofburg Palace, St Stephen's Cathedral, Demel the famous cake shop, Naschmarkt, the Spanish horse riding school etc) is around the same area. So you are quite close to all the main attractions. It's a safe area and a safe apartment complex, and Vienna is a safe city anyway.
It was clean, spacious (enough for two people), got good wifi and all the little things you need.
My only negative would be, the toilet, the water closet is a bit too cramped. Note, if you are a big made person you might find it a little difficult.
Shower and the rest are just fine.
Overall, it was a good stay. Easy to talk to Georg.