It's a tuner, and it does it's job. The clamp works well, but my only real complaint is the connection from the clamp to the tuner. It is exceedingly awkward, and take some real doing to get it in to a useful position. Largely because it's so short. I use it on a trumpet, and it's really hard to find a spot to attach it that's not in the way, but still allows you to adjust it so you can actually see the readout. I basically have 2 options. Both of which don't get in the way while playing, but are in the way as soon as I stop playing. It could use something more like a slightly longer gooseneck type arm on it, so you can clamp it somewhere out of the way, and have more flexibility with where you put the display. But, all in all, for what it is, it's doing the job I bought it to do, so can't complain too much.