The reviews on this unit were great except the locking system. I can understand why the locking system gets a let than stellar review. However, If the operator takes care when opening the unit it works great. The unit worked great on our most recent trip. We probably overloaded the box with bags for five but the performance was great. Traveled in all types of weather and cargo was always dry. I would highly recommend this unit. Very easy to intall and very aerodynamic. No wind noise.