Because I keep finding reviews that DO NOT match the particular article they're written about. Here is the information about which product my review is related to: “K&F Concept magnetic polarizing filter 67mm, 67mm variable ND2-32 filter, with 6.7 inch telephone filter mounting adapter”.The magnetic pool filter addition with mounting adapter really surprised me in a positive way. I particularly like the fact that a magnet is integrated not only at the bottom but also on the top. Although you can't use it to charge additionally, gadgets such as monitors, mirrors or holders with MagSafe function can be easily attached, which is a real plus! The ND filters are great and the CPL filter itself also reliably fulfills its purpose. It is also nice that the whole thing is delivered in a case. The only downside: The case smells really strong at first and needs to be properly ventilated first. I subtract one star for that. I currently use it with my iPhone XS Max without any problems. I'll see whether it also fits the upcoming iPhone 17 as soon as I have it. Overall, however, a well-thought-out product that I can clearly recommend! That's why I like 4 out of 5 stars.