Well guys....it does serve more than one purpose. I wont say what you should do......Whether or not you use it is strictly up to you.
But here are a couple of points you should think about............
1) It acts as a guide for your mags.......I know a guy who was competing in a steels' match without a guide. He ran a mag into the grip housing and got it jammed...ruined the mag body.
It its a defensive gun...yould better be using one of them. It truely keeps it "in line" when its being inserted.
2) It keeps crap....powder, residue etc. out of your main spring housing and internal workings.....without it you can plan on completely tearing down your guns hammer assembly once in a while..or run the risk of mechanical inconsistency...later on down the road.
In any gun....even a CZ. There is NO REASON not to use one. The DF mag brakes DONT interfere with the mags dropping. If they do...call CZUSA and tell Mike whats going on.....
Ive used both and frankly straightening the OEM's works just as well, if not better......the trick is snipping of the bottom nub that interferes with the main spring assembly when reinstalling it.............it will let it get "truely straight" when installed and actually let the mags drop.
Its up to you..........Shoot well