I stayed at the Cortina Hotel in February. Fabulous location, so close to the Marienplatz (about a 2 minute walk) and also literally around the corner from the Hofbrauhaus! Also, it's in easy walking distance of the other attractions egs Opera House, Residenz etc. There are lots of restaurants around the area so you are spoilt for choice. However, you don't need to venture out as the hotel as its own lovely restaurant and bar which seems to be very popular with the locals. I had breakfast and dinner there once during my stay and the food was lovely and the staff extremely attentive and helpful.
The room was small and spotless. But I had booked a single room (with a king single bed. It was comfortable for 3 nights and the bathroom was a decent size with heated floors and excellent water pressure in the shower!. I never heard my neighbours so the rooms are clearly sound proof.
Check in and check out was efficient and the staff helpful with directions etc. I would definitely return to the Cortina when next in Munich.