X-change Jigs

Hey guys, just wondering if anyone's using the Lindy X-change jigs?

Thinking they'd be a good fathers day present,
just wondered how they are to fish with.
Figured someone here could give me a review.

They look like a great idea IMO, just not sure how they actually switch out & if they're worth it. Might be a bad idea considering they amount of jigs we lose.

Just looking for opinions of guys (or fisherladies) that have used them.

Thanks in advance.