I’ve personally never had any of my MI sights have issues, nor have I ever had a student with a MI sight have any issues. They are not gucci, but they work well.
I was in the market for a fixed rear sight and was going to buy one from another manufacturer that makes a good unit that I have multiple of, but I recently bought an MI QD mount and MI cantilever riser for my Aimpoint PRO and am impressed with it.
Looks like I’ll be grabbing an MI rear sight now too.
I currently use the DD A1.5s where applicable but I’m liking that rear sight. Looks like a great alternative for a pretty sleek fixed rear sight. The front looks good too, but I’m still a pinned FSB guy.