so, i wanted to electrify a cheap guitar to be able to take it out and play on the street with an amp, this device is exactly what i was looking for, extremely easy to mount ,straight forward operation, doesnt get in the way and its very sensitive so on my amp it doesnt need a high level on the potenciometer, the sound comes pretty clear without too much noise this way. the sound quality of course is a bit cloudy but you can also adjust that a bit on the amp.
only downside i can find is it looks quite delicate and protrudes a bit from the silouette of the body so i feel like if you lay something on top of your guitar case it might brake off.
i would also not recomend this to record a guitar, any quality microphone is gonna pick up the sound way better