The mount is very sturdy, but there are 2 things problematic with it:
1. The mic mount should have some kind of rubber on the bottom of the thread, as mics tend to unscrew and then they don't point to the hole on the cajon (I am looking at you, Beta 52a)
2. The screw that holds the mic mount rod is a bit problematic, as it interferes with XLR connector for the mic. Even with the L XLR connector, it is a problem to screw the rod in place, and then plug the XLR cable. Maybe the problem are Betas 56a/52a, but still, it is a nuisance.
Everything else is very good, its firm, holds onto the cajon and doesn't go anywhere. You don't even notice it while you play, and if you are a drummer that moves with the cajon while playing it, this is a thing for you!