I've had one of those for several years.. I love that little gizmo.. Especially at night when I'm trying to thread black thread.. or when I travel in the car.. It works on almost every needle, even my tiny #12 quilting needles!
In fact I liked it so much I bought one for my DMIL, for my DD and for my DDIL!! Anyone who has to thread a needle should have one, it is worth it's weight in gold! (which might possibly be a bit of an overstatement considering the current price of gold!)