I bought 2 sets for my BMW 325xi with factory roof bars.
They fit just fine and have no complaints...except for the whistle noise that seems to start as low as 10 mph. The Yakima fairing does wonders for reducing 90% of the noise.
Other than the whistle noise, I love the design, function, ease of installation, and the straps, buckles and hooks that are included with the kits. The bottle opener feature was the reason I went with this one over other manufacturers mounts.
I give it 4 out of 5 due to the whistle noise.