"It does what it's supposed to do – let you practice anywhere. The sound quality is not good for jazz, but you wouldn't expect it to be. If you like fuzz you'll love it. At low volumes ear phones give a cleaner sound. I've only had it a couple of days so I don't know how robust it is. My main concern is the shape. It is longer than necessary, which means it sticks out a lot and makes it quite vulnerable. The switch is difficult to position when plugged in. The battery is holding up well so far."