It seems to be of good quality, unfortunately it is quite heavy and may potentially become tiring with continuous use, but it will probably work flawlessly for a lifetime.
Only one issue, if the teeth in the mouthpiece could close properly along the entire length, but even as it is, it will get the job done (see the photos when it is completely closed, one "jaw" is not parallel to the other, but at an angle)

I bought it for simple and amateur use at home, and I am very satisfied with the times I have held it in my hands.