We were in this area in September 2017.
In Munich, we stayed at two places. For the first 5 nights we were at Pension Lindner which we loved! Great location, very nice host, rooms well kept and maintained as well as spacious and comfy, and the price was very reasonable. When we returned to Munich, we stayed our last night at the Hotel am Viktualienmarkt. The location was great, the host was wonderful and the room was well kept and clean. It was more modern and stark than our taste, but that was not a big deal. It just didn't have the charm that PL had.
In Rotenburg odT we adored the hotel we stayed at, which was the Hotel Spitzweg. Truly, I cannot praise this place enough! The host was so kind and a joy to chat with. The hotel oozes charm. We had the two bedroom family suite and it was quite spacious and well kept and clean. The hotel does not have their own wifi, but we were able to use the cities free wifi from in our room. The host makes a fabulous breakfast each morning as well.
In Salzburg, we stayed at the Hotel Vier Jahreszeiten. It was fine, but we did not love it like the other places. It was clean and well kept, but more stuffy than we care for. The rooms were teeny tiny as well. The gentleman at the front desk was always very friendly, so I sort of hate to say anything negative, but it just wasn't our style. The location was fine as it was a very easy walk to everything.