I already own a set from K&F Concept and after trying cheaper brands in the past, I keep coming back to these. The quality really shows.I wanted the ND8 to ND32 range for my Osmo Action. That sweet spot gives me natural motion blur on the bike when I set shutter properly, and colours stay clean rather than muddy. The filters screw on to the lens thread, so they feel secure. No faffing with clip rings that can pop off mid ride. Multicoated glass looks and behaves like proper optics, with no weird colour cast and no drop in sharpness that I can see on 4K footage!This kit includes a CPL. I never use it for video, and I wish there was a slightly cheaper pack without it. They do a set that goes up to ND64, although in the UK I rarely need anything stronger than ND32, so paying the same price for filters I will not touch feels pointless for me.Overall, a brilliant little set that does what it should. Keeps my shutter in check while I am out on the bike, and these deliver it with no hassle.Pros- Secure screw on fit, no wobble, no accidental drops- ND8, ND16, ND32 are the workhorse strengths for UK light- Multicoated glass, sharp and colour neutral in my tests- Proper case, threads and seals feel well madeCons- Pricey, and the included CPL is wasted on me- No cheaper option without the CPL- The ND64 version exists, although in our weather I would hardly ever use it