Very handy for cleaning out the inside of your trumpet , wel protected so you dont damake the inside of your instrument. My only argument is that the brush is a little to soft, if you have a regular cleaned instrument it is fine, bud when you need to clean a morde dirty ( older ) instrument, you dont feel the scrubbing of the brush enough, so you need to scrub longer. Of the durability i cant tell yet, because i dont have it long enough; bud my feeling says that it will last a lifetime.