I bought this for live recording when, as the engineer, someone shows up to play live and has no pickup in their acoustic. They want me to just mic it...hello feedback. This slides right into almost any guitar in about 5 seconds and works great. I have done some adjustments on the pole pieces to even out the volume of the six strings -- big difference. 4 stars because not as nice a sound as a K&K pure mini but a lot easier and great for not altering a guitar. Very pleased.