My wife and I stayed at Giack's apartment on the last leg of our European 'babymoon' vacation in September. We had a great stay at the apartment and were grateful for the small touches such as the beer and lemonade waiting for us in the refrigerator :-). Atilla was very friendly and helpful in meeting us at the train station and showing us to the apartment. Both he and Giack were very responsive to our inquiries throughout our stay. We also liked the artistic decor and candles in the apartment. Also there is a great audio system if you choose to play some music.
The only minor issue we had was that it got quite cold in the apartment the first two nights - even after turning on the heating unit in the living room; taking a shower was somewhat uncomfortable on the colder days and we missed the ability to mount the shower head on the wall. There is a heater mounted above the door in the bathroom that you can plug in and turn on; I would recommend turning it on 15 minutes before showering to ensure a comfortable shower.
The neighborhood is very quiet and residential. There is a supermarket right across the street which is very convenient, as well as a bakery half a block away. I was shocked and amazed to see German beer for less than 1 Euro on the shelves! That was one of the highlights of my stay in Munich (besides Oktoberfest of course!!!). There are several restaurants within walking distance as well. The U2 Josephsplatz train station is about 2 blocks away and from there you can get to the Hauptbahnhof central train station in minutes which will link you to train lines accessing the rest of Munich. If you are accustomed to walking long distances, you can walk to both Marienplatz and Theresienwiese (Oktoberfest) in about 40 minutes.
While the neighborhood was great, I would say that the Marienplatz area is the prime neighborhood for tourists. It's lively and has some great attractions like the iconic Haufbrauhaus, as well as being very close to the English Garden park - both of which I would highly recommend.

Overall we had a great stay and would recommend Giack's place for a great stay in Munich!