So I've been looking into changing to vic mallets because I like the way the ones are my school feel and I wanted to know how anyone feels about the multi app series for marimba or vibes. Do they work well for many applications like advertised? Last long? Should I go with the rubber or synthetic cores? How do the individual mallets sound or feel? Also I would like to know how the virtuoso series compares to them and whether I should consider buying different mallets for the marching field or the concert stage