I stayed at Nga's with four friends on a lead up to Oktoberfest. The flat is very well located for Munich, right next to a U-bahn that will get you to the city centre in 5-10 mins.
The flat itself is lovely- large bedroom with a big lounge with sofas that double as double beds. Also a spacious kitchen.
Nga was very accommodating, and we all thoroughly enjoyed our stay in Munich!