One for the camera nerds now – one issue professional filmers have with GoPros is their inability to adjust the frame rate, footage can look harsh and jerky when compared to DSLR/camcorder shots filmed at a rolling shutter speed.
One option is to kit your GoPro lens out with an ND filter, this reduces the amount of light that gets to the lens meaning the processor can open up the shutter speed, handy in the bright alpine conditions we all ride in. This one from Fotodiox also come with a polarizer and UV filter so depending on your needs and the conditions you can also cut down on the snow glare.