I'm starting to think it's a gimmick, not too many people sell them, it was just $30. RevMax claims that the plastic one can easily crack causing the filter to fail, thus being detrimental to the transmission. I don't know, I'm sure the stock one is plastic. It's just one of those things, while you have the pan dropped, I had thought "might as well"...
I suppose if it were super critical, Geno's would be stocking them:-laf