None. They are horrible. I got a really bad double feed jam that I could not fix.
I couldn't drop the magazine, and couldn't separate the upper and lower. I was literally scared I would get hurt trying to free the jam with tools.
I felt it was unsafe to try and get it home in that condition plus maybe it was illegal driving around like that? Plus what gunsmith would take a loaded and jammed gun from me?
I was at my local range and there was no one else there to lend a hand or advice.
I thought I was out of options but one, and that was to scratch off the serial number, wipe off any fingerprints, walk out into the woods, dig a hole, and bury the gun. I seriously contemplated that.
In the end, I took a chance and put a screwdriver in and pried out the live rounds out. I felt like a bomb squad tech defusing an IED.
Fuck that mag lock bullshit. I would rather take a chance breaking the law with an "assault weapon" than ever put a mag lock on any of my guns ever again.