This does seem interesting, would like to know more!! Doesn't say how much though!!!! If it really works then it could be worth while getting one, but does look like it gets in the way a bit especially as you can't see as well were your file bit is placed on the nail if you get me, as it sort of obstructs your view.
I got one and I'd say "save your $$$" !! It's only about 100 watts (which isn't that strong), it's expensive for what you get (JMO). The piece that fits on your efile is on the "heavy side" that get tiring on your wrist:irked: I would suggest checking out some other way, I know other techs that have just purchased small/little vacs for ALOT less $$$ and have more suction power!! JMHO