Rotating the outer filter is extremely smooth - much, much better than I expected on a filter of this price. I suspect that those having problems turning it mounted it on their cameras too tightly. On my Sony Rx10 iv, I’m able to operate this filter easily when mounted on top of my UV filter even when the hood is on. I also found that my lens cap attached tightly and stayed on as long as I positioned it carefully before snapping it into place. The ease of removing it from the camera depended entirely on how tightly I put it on. In my worse case scenario, I found that using the rubber band trick worked well. The filter is extremely effective at removing glare and reflections when the camera is properly aimed at roughly 90 degrees away from the sun. I like the protective case it came in, and it fits beautifully in the top pocket on my Ruggard Hunter 35 camera case. 4/5 on picture quality because I noticed a small color shift in some circumstances. Overall, I’m glad I got this one instead of the Hoya I was thinking of getting and for which the price was just recently jacked up to an excessive $95 from $80.