I have the PolarPro and I'm not that happy with it. It distorts the images which then require me to fix in Lightroom, the horizons bend at the sides. The colours are also quite different. I saw some comparison video where the YouTuber recommended the Nisi over the Polarpro with accurate colour reproduction. The Nisi filter seems to be fixed though with no polariser to turn. Just seeking others advice. I'm into photography more than video so would prefer CPL over just polarised ND filters.