AcMaxx looks great, especially if you use the screen for chimping. I only ever use the screen for menu setting, so a less-clear protector doesn't bother me, and I like the fact it doesn't have a frame and add thickness. I use Best Skins Ever product, which is the same as Zagg Invisible Shield except I could buy a large sheet of it for $9 enough to do many screens. I don't use their soap-spray method, just cut a piece about 1/4" larger than needed and apply it starting at one end using a piece of thick cardboard as a squeegee, then trim the excess with a straight-edge and a #15 Bard-Parker scalpel blade. I've never had to replace one, they don't lift and scratching them vigorously with a key fades in seconds. They use the stuff on the edges of helicopter blades.
BTW having had the sapphire screen on my M8U, I can attest that though the glass might not scratch, the coating sure does, and fairly easily. Didn't show when the LCD was lit, but when it was dark you could see a mass of scratches. Had I known I would've put a protector on it.