I received this a long time ago in a magazine promotion (got to love free makeup with magazines). It really does lengthen your lashes and the brush helps keep them separate too.
The packaging is a square tube with a mirror on one side (which I never actually used as it was a bit too small for me). The wand had a long section of brush that is very full of firm bristles that lift and separate your lashes. The fibre is good at staying on the lashes as long as you don't pull on them and it washes of easily (with either makeup remover or facial cleanser). It didn't irritate my eyes at all and I am overly cautious of eye irritants after an event that escalated very quickly.
It is NOT waterproof!
It doesn't add volume nor does it claim to, and as for curl... didn't see any, this is purely for lengthening, and it does that well. I do have one white eyelash and to be honest it only covers it patchily but the rest look long and natural looking (not hair spider legs). Smudge-proof... yes, it didn't smudge or flake as long as I left my lashes alone.