I am trying to plan. How long would be needed to get a good feel for Muemster and see what is on offer?
Do you intend just to stay at Muenster itself or do you want to explore the area too, with all the moated castles ASO?
I think 2 days would be enough to get a feeling for the town but it depends on your interests: culture, history, art, shopping, nice ambience, ASO
A day should be enough for the average tourist.