I bought a new Yamaha classical nylon string guitar a few years ago and wanted to add a pickup. I bought this pickup since it was cheap. It sounded great when I stuck it near the bridge. With a little digital reverb the sound was very close to the Simon and Garfulnkel/Peter, Paul and Mary acoustic sound. A couple of years ago I ended up glueing it to the inside (near the bridge), splicing the cable and mounting a phono jack to the back of the guitar. It's still solid and sounding great with no cord hanging down the front to hassel with. I don't know if there would be any feedback problems with other instruments since I only use it for home recording. Also I've never tried the in hole pickups so I can't compare it to those. I'm about to buy another one for a Jasmine.
Fan of folk rock