Can I say that this is one of the coolest damn features of the thing? Took it on a kayaking trip last weekend, dove 15 feet into water while taking a selfie vid. Sure you couldn't see a damn thing from the footage but man if the thing doesn't still work perfectly. Only minor niggle is that the water messes with the headphone detection so underwater music playing is a no-go unless you get some kind of headphone jack cover/insert.
The IR blaster is neat too, though the built in samsung smart remote app leaves a bit to be desired in the button placement department.