I've tried it. It's been discussed a couple different times either in this forum or the freshwater forum. I got plenty of bites but they'd always either throw the hook out or not get hooked. The iron is so bulky and heavy that they have no problem throwing it out of their face. I've heard of one guy who fished Casitas for like a year throwing iron and he finally caught one fish after a year. Give it a try and post the results.
-Brian