I found these cool magnetic dust filters for the NZXT Phantom, are they any good?

[PositiveProton]

http://www.xoxide.com/demciflex-magneticfandustfilter-custom6pieceset-nzxtphantom.html

 

I have the Phantom, and dust is a pretty big problem with it, seeing as there aren't any dust filters.  I was looking around for dust filters, and I came across these.  Does anyone here own them, and are they any good?

[Andi]

these filters are really good. didn't know they make sets for individual cases!

[joelthezombie15]

thats cool, they are from modmytoys so they are pretty good but $60 for them OMG that is so expensive, and yet i will probably buy them to.

[virusal19]

They look good, but they're expensive O.o