I've had one little glitch. The take down latch/hold open pin fell out. I replaced it and the catch with one from Gun Parts Warehouse that uses a nyloc nut. As a side benefit all of my magazines hold open the slide on empty.
Sometime my slide doesnt hold back on the last shot.
That is a peculiar issue
http://www.youtube.com/watch?v=r6w4kZXi1Uk