I got these because I needed something with more than 2 pickups and had longer wires for spacing in a harp soundbox. The sound is great and I'm really happy with this. I don't need a pre-amp going into my pedal, either. The ONLY criticism I have is that there were no instructions with it. They were just "going commando" in a baggie"¦and having not ever worked with pickups before, some instructions would have been nice"¦like what's the block and zip tie for? Still very happy with purchase!

I installed these into three of my acoustic guitars: a 6-string, 12-string, and a nylon classical/folk. I'm pleased with the results.

Installation: First, I did some pickup location experiments by temporarily sticking the pickups on top of the guitar using tiny dots of poster putty. The locations shown sounded best to me, YMMV. There was plenty of flat open space between the x-bracing at each location. For the jack hole, I removed the existing strap button, put a piece of masking/painters tape over the hole location to prevent chipping the finish, and drilled the hole for the jack using successive bit diameters. Then I taped up a couple of ordinary pencils together, stuck them through the drilled button hole, and out the sound hole. The pencil's eraser end fit firmly in the jack, holding it firmly in place while fishing the connection jack through the button hole.

All the stick-on piezo pickups I've used only seem to have enough signal for a short patch cord to the amp. They always work best when routed through an inline preamp/di box, for example https://www.amazon.com/s?k=preamp+di+box+for+acoustic+guitar but I also found that using a wireless guitar transmitter receiver worked just as good as an inline preamp, e.g.. https://www.amazon.com/s?k=wireless+guitar+transmitter+receiver

Ordered this set for my banjitar I recently bought. Watched a couple YouTube reviews in hopes that I made a good purchase since it was rather inexpensive. Reviews seemed good. Installed them in my banjitar with ease. Very simple straight forward install. Mounted the 3 pads to the underside of the head just behind the bridge, drilled, and mounted the jack, ziptied, and secured the excess wiring, and plugged her in. It sounds great! Works like a charm. Only worry is what to do when the time comes to change the head, but for as cheap as the set was, I will probably just buy a new set. Highly recommended if you have a banjo, or banjitar. Can't speak for any other instruments, but it works great for these applications. Enjoy!

After repairing a 1935 Oahu Hawaiian guitar I decided to electrify it. I didn't want to break the bank so I ordered two sets of these pickups. The install went well. I actually used a double back tape to attach the sensors inside the guitar body. The results were amazing. I play through a Marshal 265 Valve State and the old guitar has been reborn. After my success I installed the second pick up on an old Alvarez twelve string. It sounds full and powerful. Very pleased with my purchase.

The pickup heads are enormous. Definitely too large to mount all 3 on a guitar bridge-plate. However they're so cheap, you might not care! I am using this on a cajon, so the size wasn't an issue at all.

Sounds good on the inexpensive cajon I have. It does a solid job on the low end and snare snap. So far so good on the adhesive, but I anticipate having to super glue the elements later.

Installation is dead-simple on a cajon - put two of the piezos where the snares are (if you have them), and one at the sweet spot for bass. Then drill a hole for the jack.
I used a 15/32" bit; a 1/2" would work as well. Cable length is fine for this application, jack feels solid and can mount through up to around 1".

With cajon, this gives a very good output level, similar to an acoustic guitar piezo with active electronics. Nice to not need a battery too.

EDIT- The plastic covers just snap into place, they are not molded. Found this out when chasing down a rattle on the bass element on the cajon. I unsnapped (removed) the cover, and that takes care of the buzz, but I will be filling up the cover with some RTV sealant and reattaching it to protect the solder joints. After about 15 hours of play, the included adhesive is still sticking.

Edit2: All three of the covers developed rattles, so I took them off with a Stanley knife, and covered the solder connections and wire with RTV sealant to keep things from coming loose. Rattles are now gone. Would recommend doing this preemptively if you buy these. Adhesive is still holding well.