I agree with
@snowatom that the ESR screen protector fits the SE quite seamlessly! After it coming up
here and in this thread, I decided to give it a try. I tried the Belkin before, since that is what Apple and all the serious resellers carry, but that was terrible, as has been said.
Because is it so edge-to-edge, it is practically invisible. It stops exactly where my case begins so you don't even see the edges of the screen protector.
Only a few minor details you may want to consider:
* The added layer makes the home button feel slightly more sunken in
* For the same reason, the sides of my case don't rise as high above the screen as without a screen protector (meaning slightly less protection when placing the phone face down)
* At the black side borders, the protector might cut off a teeny-tiny portion of the screen. I'm talking barely visible, if at all.
* Because of the snug fit, I had to be careful to not have the edges of my case push up the screen protector while removing the case
But these are just minor details, some of which inevitable with any screen protector, that don't interfere.
While I'm at it, I wanted to show of this case that I paired it with: the Smartish Kung Fu Grip, which I found through a Wirecutter review
here. I thought it looked good, particularly with the white iPhone. For extra thoroughness, I even added a foil back protector underneath the case which becomes entirely invisible with the case on. It's just too bad that over here in Europe we still have the eyesore of the CE and trash can marks on the back

.