Just returned from 3 nights at the Platzl during Oktoberfest. We had a great visit and I would absolutely stay there again.
We took the S8 train from the airport to the hotel as the Platzl is easily withn a few hundred yards of the station. Don't waste your money on a taxi.
Our check in was quick and the staff all spoke good English. Our room was very nice and we had a great street view. The location could not have been better. Train access was very close; the Hofbrauhaus was directly behind the hotel and there were tons of restaurants and shops in the area.
For location and clean comfortable rooms, it would be hard to top the Platzl.