I wanted a functional quad rail and this fits the bill. It's not fancy or ultra-lightweight, but I also didn't pay $150 either. For this low of a price, expectations were exceeded.
Only major grip is the carbine length will only hold 3 sets of Magpul Enhanced XTM panels. It is supposed to hold 4 sets, but they won't line up. Still looks/works fine with 3 panels, which actually saved me money.
Pros: fastens securely, functions as expected
Cons: non-standard slot count, slightly heavier than the expensive ones
This review was written in the old system and had content requirements that are different than reviews written today.