I am using the Force Glass screen protector I bought in a store for 39.99€, the installation is quite simple and fast. The protector comes with different tools to clean the screen first and it has a small system to help you installing the screen protector, of course it is glass, so it is good. Though it does not cover the edge fully, it covers the main part of it. While I had issues with my installation (the bottom left part of the screen being less sensitive than the rest) it is a quite good protection.
I am also using for the back the rugged case with stand from Samsung, it has a gap between the edges of the case and of the screen protector, it can become a nasty place in a short amount of time.
But in the overall my device seems protected.