I bought one of these years ago at a friend's suggestion. I was in a band with six other people and no matter how my monitors were my guitar would get lost in the stage noise. PROBLEM SOLVED. I put this thing under my amp at a gig untested and heard every note I played that night and so did the band. I even noticed in small venue situations, where I needed to set up close to the drummer, it even reduced his snare wires from rattling when I was the only one playing. It solved so many sound problems onstage, in the studio, and in rehearsals. Get this thing if you like to hear your self play. Great for bassists too!