I play 4 to 6 gigs a month with a three piece band or solo and have been using this unit for a couple of months. It has served me well. Simple to use and very effective for basic harmonies. I keep it low in the mix and it sounds like real back-up singers. The only down side is remembering to engage or disengage while emotionally performing. Also being careful not to change the settings with your foot. I think this unit is very useful and of great value.