In a comparative test, IMTEST intensively tested four different rear box models and evaluated them in terms of handling, volume, weight and price. It was particularly emphasized that the BackBox is well-organized, robust and easy to handle. The exchangeable side inserts for widening for ski transportation make the box unique. As a result, the BackBox from mft came out on top across the board against the competition from Thule, Westfalia and Narauto.
Link to the official test result: https://www.imtest.de/389211/kaufberatung/mobilitaet/auto-heckboxen-anhaengerkupplung-test-vergleich