The magnetic system is what makes this make sense, because if it were with tweezers or with a rare piece, you're already lazy. Here you bring it closer to MagSafe, align with the cameras (and you don't have to be a surgeon), and that's it. It has the cutout for the flash and it doesn't cover it, and the hole for the antenna looked like smoke to me but hey, no signal cuts or anything. In terms of use, the polarizer is helping me especially with photos of shop windows (less reflection of my face, thank you) and with water, which is where it sings the most. I also notice the colors a little “cleaner” and the contrast goes up without looking like a rough edit. I haven't seen a loss of quality in the photo, or vignetting, or that “soft image” effect. The only thing is the case: with a good MagSafe case it goes perfectly, with a case without a powerful magnet the support loses its grace, and if the case has a raised ring around the cameras it can be slightly tilted. I don't always leave it on, I use it as an accessory, I keep it in its hard case and that's it, so it gives me zero problems. In short, if you like to take photos and you are annoyed by reflections, this CPL for mobile is a success and you will also be able to use other 58mm filters in the future, and once you enter the world of filters you can no longer get out. You are warned.