Pretty good system
I like the concept, the construction and the product. Works well in the bed of my nissan frontier. However, putting them in was a little bit of a pain, lining up bolts and such. The manual said to use 5/16 bolts, turns out they are more like 9/32. I just drilled the holes in the bracket out a little. Also, loc-tite or a lock washer is definitely recommended as the bolts will loosen up over time.
All in all, it's good, cheap and reasonably secure.