I knew the product to be put on my previous phone, I kept that protection for 2 years without worries. I removed there is little for the following reason the "glue" to keep secure this protection left small traces on the screen. When I removed the phone screen is new. Despite numerous claws Protection, the screen is nickel.
I have set as 4 * because I never tested the function to remove the protection, clean and then put it back. I do not know whether the protection would hold the same level it has when it is new.