I love the mounting system, super quick, easy, and secure. The one key system is pure genius with the only downside not being able to pick your own lock number. Perhaps Thule might want to consider place the number of lock barrrels in the description. This rack requires six. When I ordered it, I ordered two barrels to match my other Thule products. So I didn't get everything I needed right out of the box. And considering it requires six barrels, Thule only supplied four?