The polarizing filter is likely the most valuable for the digital photographer. It cuts haze like a UV filter. It darkens blue sky causing the clouds to stand out boldly. It increases saturation without changing the color balance of the vista. It midrates reflections off water and glass and most non-conductive surfaces.
Film photographers used a “linear” polarizing screen however; digital photographers are advised to use a “circular” polarizing screen. This is because; the common polarizing screen can hinder auto focusing and exposure determination. I say, try what you have; it might just work for you. If you are purchasing, get a circular polarizing screen.
The “circular” type is actually two filters sandwiched together. The first one is a “linear” and this does the deed. The second is called a “retarder”. This filter rescinds the polarizing action thus the camera’s apparatuses are not impeded.
As for me, I have the experimenter’s gene, I have used a linear on digital and I have never seen any jeopardy. But, I don't doubt it exists.