I bought the KD-1 for use in the studio to add electronic "oomph" to my mic’d setup. This product works well as a trigger and sometimes too well. I had a lot of trouble finding a spot on the drum where the vibrations of the head wouldn't cause multiple triggering - I tune my kick drum batter somewhat loose. I ended up mounting it to the bass drum hoop with some PlastiTac, that gooey clay like substance that most people use to hang posters without making holes in the wall. Seems to work okay when the sensitivity is set low, but volume is compromised on settings with dynamic control. There is some give and take.

My neighbor just got triggers for his studio, and wanted me to try them out.... WOW, you could roll fast, BUT on slow grooves it MISSTRIGGERED!