First of all, it is a durable protective membrane. It had a QR code which, when scanned, shows you an informative installation video! It requires persistence to remove all the bubbles (it gave me a little trouble). It sticks very well and does not affect touch and image quality!
For scratches, it is perfect! For heavier impacts, it remains to be seen....
Tip for application: apply the screen while it is still in its case so that it does not press on it later and cause the edges of the protection to come off!