Interesting concept, but not for most noses.
It's an interesting idea for increasing tip projection. How comfortable it is and how much it affects breathing is unknown to me. My only concerns about its use would be either knocking it loose (where you might inhale it and choke on it) or that it would irritate and erode the delicate skin of the nasal vestibule...especially since it's being placed under pressure.
It's a pretty limited device in what it can achieve, in my opinion, though. As always, caveat emptor.