The whole concept of cases and screen protectors is completely unfathomable to me.
Why would one buy a piece of technology that has had it's ergonomics researched and developed so it's both beautiful to behold and satisfying to handle, and then ruin it by encasing it in some cheap £10 piece of plastic?
It seems to me to be like going to Saville Row, buying a stunning 3 piece business suit and then wearing a binliner over the top of it to stop it getting dirty/damaged.
Let your iPhone breathe.