I purchased the PRX Profile Rack with Kipping Bar as well as the 4-Peg wall mount and everything is as advertised and the set up is quite simple if you follow instructions well.
I own several items from PRX and they have all been high quality. Since I don't have a reliable spotter most days (as with most garage gym owners) I decided to grab the spotter bars and they have worked as well as I expected. They fit snugly to the PRX rack and appear to be very sturdy although I have not slammed the bar down on them. I recommend to anyone looking to complete their garage gym setup.