I've got the orange front sight on my competition CZ SP-01, and really like it for that use.
I've had a few shotguns that have come with them, and with each of them (two Beretta Teknys', and a Browning Citori 525), the front fiber rod sight has come off and been lost... I have not replaced them on the trap/sporting clays guns because I really try not to look at the front sight, anyway. With proper gun fit/mount, I'm just focused on looking at the bird. I have not missed the front sight at all on those sporting shotguns, in fact, I think the fiber optic front sight was a distraction to focusing on the bird. That's just my experience, and opinion...