YES
It does work, thought id add my bit.
Black/white rec day paint seems to be okay,
I run RPS Slam paint through it most of the time, and have had no problems with it at all. A few 'non believes' have borowed the marker and taken it on refusing to use the vision,,, guess what? They limped back with a truley smegged marker!
Converts they now are
I havnt chopped a single ball since i got it in January, works a dream without it on as well mind you, if your used to it.
If you did have a trouble with a particular ball as said earlier, its pretty easy to adjust it to accept it.
go get one!