Had this been a bit cheaper I would have given it 5 stars. It is just right for tweaking reeds, but it does seem a bit expensive for a piece of glass that looks like it's been washed up on the shore. Having tried - mostly unsuccessfully - to adjust reeds, either with bits of sandpaper or scraping them with a razorblade, I can now say that having the right tool makes a big difference. The classic sax player's dilemma is whether to buy a box of reeds expecting some will play too soft or whether to buy the next strength up, expecting most of them will be too hard to be playable. Armed with this tool one can easily tweak the ones that are a bit too hard. Even just a little sanding on the back so the reed fits snugly on the table seems to improve the playability of a reed without affecting it's playing life.