Hello,

According to the manufacturer, their product will last 12 to 15 months. I personally installed it less than a week ago so I can't say for sure how good it is, but it's still an extra layer of protection, which can't hurt, IF it does. I applied the product on a phone with an already ultra resistant screen, but I'm even less scared with the extra layer, it still avoids micro-scratches.
I'm not sure if it's a good idea to use the product on my phone, but I'm not sure if it's a good idea to use the product on my phone, but I'm not sure if it's a good idea to use the product on my phone.