So I finally got the Thule bike carrier I ordered. I'm very disappointed. Dig this: the bar and the locking head are held by only one screw. The locking head, which holds most of the bike's weight, and more importantly maintains it vertical, it held onto the roof by 1 (yes, *one*) measly 5mm screw! For the rear, it's even worse: it's a metal-and-plastic plate with a single plastic locking handle. The carrier is so narrow the bike rocks from side to side alarmingly, with nasty creaking noises, at the slightest vehicle movement. And worst of all, the locking head actually tends to open up by itself, and the only thing that prevents it from doing so is the fragile-looking key lock thingy. Check out these pics:
(Say hello to the only screw preventing the bike from flying off the car)
(There you can see how narrow the thing is, barely twice the width of a tire. How do they expect the bike to not rock sideways like a chihuahua on crack cocaine???)
(That's my bent on the car. Admitedly, it's a big top-heavy bike, but still, I believe the bike carrier would be inadequate for any but the lightest bike).
In short, avoid this bike carrier like the plague. It's definitely a rip-off.