The location of the Platzl is perfect. Close to the Marienplatz and literally right around the corner from the Hofbrauhaus and Hard Rock Cafe. Our room was at the very top of the hotel and our windows overlooked the Hofbrauhaus/Hard Rock Cafe. To counter what other reviews have said, we didn't hear any noise from those two places, but that might have been because by the time we got back to the hotel, they were closing. The minibar in the room was well stocked and there is a safe in the room so that's an added plus. We were there in August and the AC seemed to work fairly well, even at the top of the hotel. The shower was a bit awkward and water sprayed everywhere the first time I turned it on, but that's pretty commonplace in Europe.
Recommendation: I would definitely stay here again! It's on the expensive side, but the location is absolutely perfect.