Summary: These lenses are excellent. Yes they replace the one you've damaged which is what they're meant to do, but before I'd thought about getting replacements I think I was a bit precious about the front lens as I always am with optical equipment. Well not now! Now I don't care if i scratch the lens because it's so easy to replace! So i'm much rougher with the GoPro than I used to be. Lenses are dead easy to replace as you get the correct screwdriver in the kit. Awesome.
Summary: First off let me say that the screwdriver that comes with it probably doesn't work. You need a #5 torx. Other than that this kit was very easy to install and was of good quality. I was surprised to find out that the lense covers are nearly ¼" thick.
Summary: This is a good product to get when your GoPro needs a new lens. I had been coping with a scatched lens for about a mounth and I counldn't stan the blur any longer! It was easy to replace the old lens as all the equipment was in the package.
Summary: The lens is good quality. I did find the screw driver pretty useless as the handle twists as you try to undo the screws, binned the screw driver and used one with a good handle. Seals are 100% waterproof, test it out by going Kitesurfing in Gale force winds and 8 ft waves, no leaks.