The question was asked about sights, which brings up one of the worst flaws of the original design.
With the Ranch model, the rear sight is crappy, but scope mount is built in.
With the Standard model, the rear sight is robust and adequate, but adding a good scope mount is an expensive proposition.
The newest Mini, (I think) has a good sight, and a built-in scope rail.
I've had 3 Minis.
With my last one, I bedded the action. I had the barrel shortened to 16".
I installed a smaller gas port, and sent the trigger off for a trigger job.
Still never shot less than a 4" group at 100 yards.
I would say they are reliable, and minute-of-badguy accurate, but it's still a pain to get good mags.
With my current (cheap kit gun) AR, the first time I sat at a bench with iron sights, and mil. ammo, I shot a <2" group!
And, I seem to like to "accessorize" my rifles.
There's just not much you can do to a Mini, compared to an AR.
That last Mini got the gun out of my system.
I'm totally sold on the AR from this point on.