UPDATE:  2 weeks after getting this, each class was given a new School Pro. It really is so much better.  Like,  I sharpened 25 pencils in one minute.  Yet,  since our former one broke (as did the pro in another class), I do know that they aren't durable.

I work at a school with three classrooms, and two of them had Exacto Sharpeners (one school pro, the other XLR).  I figured I'd continue the tradition in my room by purchasing yet another Exacto brand sharpener.  (Formerly,  we had a school pro in it but it broke).

The first one sent to me didn't power on, but this one does...and boy does it.  It's audibly powerful.  Like,  noisy as heck, in part because it rattles on the wooden bookshelf it sits on.  I'm thinking of placing it on a mouse pad to see if it dampens the sound.

Even after the pencil is pulled from the unit,  you can hear the grinder spinning.

But, hey, it produced a mighty fine pointed pencil tip...after a bit of finessing.  You have to insert it just enough (but not too much)  in order to sharpen, and you have to rotate it in order to get all sides.
UPDATE:  2 weeks after getting this, each class was given a new School Pro. It really is so much better. Like,  I sharpened 25 pencils in one minute. Yet,  since our former one broke (as did the pro in another class), I do know that they aren't durable. I work at a school with three classrooms, and two of them had Exacto Sharpeners (one school pro, the other XLR). I figured I'd continue the tradition in my room by purchasing yet another Exacto brand sharpener. (Formerly,  we had a school pro in it but it broke). The first one sent to me didn't power on, but this one does... and boy does it. It's audibly powerful. Like,  noisy as heck, in part because it rattles on the wooden bookshelf it sits on. I'm thinking of placing it on a mouse pad to see if it dampens the sound. Even after the pencil is pulled from the unit,  you can hear the grinder spinning. But, hey, it produced a mighty fine pointed pencil tip... after a bit of finessing. You have to insert it just enough (but not too much)  in order to sharpen, and you have to rotate it in order to get all sides.