I'm an advanced hobbyist. I have Canon gear up to and including L lenses. I have a Samsung S22 Ultra for a phone. Is a phone camera ever going to replace a DSLR? No, but you always have a phone in your pocket when the big camera can be nowhere to be had. A polarizer is a pretty essential piece of gear for bringing out skies, pulling a mountain out of the distance from the haze, making water deep blue instead of reflective, making the color of flowers pop, and the list goes on. That's the one thing that's always lacking on a phone cam - a polarizer. I'm glad I got the 67mm because with the layout of the lenses on the S22 Ultra, (the newest Samsung Ultra phones have the same lens layout) a 58 millimeter wouldn't work. Comes in a nice hard zipper pouch, cleaning cloth, and a short bright orange lanyard. The filter, like most quality filters, has etched legends around its edge, and it's very smooth turning and has no distortions that I can find. I have dealt with cheap polarizers and they can have issues, this one has none of that. The holder is great, as it's a parallel arm that pushes with the button and goes onto the screen with a soft rubber pad, so it's not like a clothes pin style like some I've looked at before I bought this one. All in all a very worthy purchase and I'm going to use it often. The case is a little less than 4 inches square and maybe an inch and a quarter thick, so a coat pocket item that you can keep with you if you're on a short hike. As far as quality is concerned, even the document that comes with it is on heavy card stock. There's nothing cheap made about this filter or the mount. And of course, a threaded 67mm mount will fit any standard filter that you have. I have a kit full of 67mm filters, so I can go play with my phone with IR, Star, ND, graduated, and other things for when I want to go out somewhere and not drag along a 30 lb bag of DSLR gear.