I like that MusicMaster is so flexible. I can work very fast and stable and the Rule Tree gives me the possibility to find all the rules I need very fast but I can also build a very complex rule-system if I need it. Flexibility in rules is only one aspect. The possibility to define multiple layouts and so that each user could define a favorite one is awesome. Everybody has an optimum overview for all the relevant data. Additionally I like the service and support, and I can always explore new features that are obviously suggestions from other MusicMaster users.