In my opinion, NEEWER has once again brought a product to market that amazes everyone - me at least! The filter comes in a bag that I don't find particularly practical. Why not practical? I'm more of a fan of those hard cases that you can put the filter in. That's a personal preference, but I wanted to mention it anyway. Installing the filter is very easy - take the filter out of the case, screw it on, and you're good to go. I use the filter on a Tamron 24-70mm 2.8f G2 and it fits perfectly. No jamming or anything like that. What I've gotten into the habit of doing is not tightening the filter so much that you can't get it off later ;-) It happened to me once, and never again *just saying* I consider the filter quality to be high-quality and good. I think the dial for turning the ND filter into the desired position is a good solution. A well thought-out concept so that you don't accidentally touch the glass with your fingers. For my purposes, the ND filter is absolutely sufficient. In my opinion, the image quality is really great with the filter! I think the price/performance ratio is good and fair. I've had good experiences with the filter!