I got the K&K Big Twin piezo pick up to use it for an iranian setar, a small acoustic traditional instrument, which is not easy to sound with mics. As i started to play with it in a band context with electric instruments; i decided to give a try to this piezo. And the result is great so far, easy to install, crystal clear sound, work perfectly for what i want to. Im also trying to add effects with electric guitar pedals on it and works very nice. It would have been nice to have a volume control beside the jack plug, but it s ok is not a major problem. It is my first experience to use a piezo on an acoustic instrument; and find the sweet spot where to stick the piezos on the instrument was easier than i expected. Some minutes trying different positions before to stick it and it was ok. I did not had big troubles of larsens while playing high volumes ( i play on an acoustic guitar amp and works perfect, i also tried it on an electric guitar amp and i got some larsens but i could solve this playing with the amp EQ ). I have played on live situation and worked good. So, for the price i find it s really nice piezo and works well, clean sound. Thanks Thomann!