I don't care for piezos any more either on guitar or mandolin and I have tried most types. Now I use a standard Shure SM 57 for everthing. Takes a bit more care to avoid feedback and I can't leap around anymore like I used to (that must be a great relief to everyone!) but I'm much happier with the sound. Instruments? Eccleshall A5 mandolin and Lakewood M-18 guitar if that's any help.

Peace,

mcmoo