I used various Fishman's years ago,which required,saddle modifications,often resulting action problems[possibly due to careless installation].....sound was OK,but just...these were all on Martin dreadnaughts...went to LR Baggs I-Beams when I started to play small bodied Martins[OM 21/OM28/OM35/00016SGT]....pretty much perfect acoustic sound,to my ears,plus many favourable comments from audience members....I know very little about the technology;these were recommended by a reputable dealer;I'll probably never be looking at any other kind....for what it's worth....