The Front Runner rack is a nice rack. With the T-slot track system, it's relatively easy to attach anything to it. I like the fact that Front Runner sells so many accessories, but I've had to fab a few of my own so far, and the slots really do make it easy. As long as you use M8 bolts and space them properly, it will attach to the rack.
Unfortunately, as others have noted, it's pretty noisy above 50mph. Now, I've lost my perspective a bit over the years... I've never owned a roof rack previously, so I don't have anything to compare it to and I also have a light bar up top which probably adds to the noise. That being said, when I first installed my rack, i didn't notice any real difference with the wind deflector on or off (btw, it's included with the rack... not something sold separately). It also makes the wind buffeting over the sunroof severe enough that if you opened it at highway speeds, it would probably rip the thing right out of those (already cracked) plastic tracks.
Would I purchase it again if I had the choice? Honestly, I don't know. I've love to ride in somebody's LR3 w/a Prospeed rack and see what the noise difference is.