I looked at everything I could find and was prepared to spend whatever I needed to before making this purchase. I believe that you get what you pay for, and there are several top-tier BUIS units on the market. I don't know that there is a tremendous amount of difference between these, the Troy, Diamondhead, DD, etc.
I managed to catch these on sale at Opticsplanet.com for $79.99 w/free shipping/no tax and that closed the deal for me.
These are top quality, mount easily and securely, look good and fold down low enough to use a scope/holo/red dot unit. I think you will be very happy with these sights, whether you are a civilian, or someone who depends on them every day.
Pros: Quality manufacturing and materials, design, folds down low
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.