Great sound, portable, decent construction. However Im a mechanical engineer and whoever designed this has no idea about live music and the need to provide durable equipment. The battery door and belt clip are the weak link. They can and will easily break. Prior to breaking mine, I have since applied heavy duty epoxy to the back of the unit and reinforced the belt link foundation and battery door. This is no longer an issue. If you break the belt link or battery door, the unit will only be usable with duct tape or some other cobbled together contraption.