Fantastic program. Can't say enough good things about it. Great design. Ultra ergonomic. Runs in the background. Simple, effective, rock solid. CintaNotes would be worth ten times the asking price. Not affiliated, BTW. Just like to do what I can to publicize good programs.
For me, though, the excellent interface and features of CintaNotes work better than any of the other apps. It is snappy, beautiful and the functionality is just right. It also handles the tag based approach for managing notes perfectly well.