The assembly of the bikes (mountain bikes, full suspension bikes, disc brakes) was easy and quick, thanks to quick-release devices on the wheels and the frame fixations.
Frame fixations: a bit too short and they have the side a bit to my taste too much play. Only through close-fitting fixing of the wheels will come of a decent, stable package. The teeth of the plastic belt of fast voltage gives the impression as if it were already wear. The frame clamping belts are complemented by an inserted rubber buffer to prevent paint scratches on your bike frame. For modern MTBs with thick frames to briefly failed ==> taping the frame to the appropriate places is recommended. Other critical points on the axles, brake cylinders, fork and frame tubes must be taped against chafing from bike to bike.
Abklappmechnismus: Ingeniously simple. In bumpier ride the whole carrier wiggles his bike a bit, since an additional site was introduced with play with the hinged joint. But I think this is no cause for concern.
Recommended with a few minor improvements. 4 stars.