Although they are well-suited to range use and competition, I don't know how practical they would be for everyday OC.
The "retention" system on them is essentially a set of VER?Y powerful magnets molded into the frame, and a friction snap type device that holds the trigger guard.
I prefer a holster that gives my pistol more protection, and has a more "authoritative" retention system, like a thumb snap or a Serpa-style mechanism. But that's just my opinion. YMMV.
If you can find one cheap and used, or know someone who has one that will lend it to you for a few weeks, then give it a try, but they are pretty spendy to take a chance on purchasing new, if you're not absolutely sure it fits your needs...