The (small) problems are in the details .....

The easy assembly is important since the fixture has to be reassembled from individual parts to the basic rack every time. Fine, but a bit cumbersome. In the unloaded state can not be clamped to the hinged arm and is easy on the carrier on. Not ideal, but not a real problem.

The arm of the carrier must be set to the frame thickness of the transported bicycle. If you choose this setting only a little too tight, it needs some power the (plastic) to connect the rocker arm and to re-open. The lever can be easily damaged. This happened to me twice, the levers of both carriers are now torn, but still functional.