REVIEW - Buying a Roof Box / Cargo Box? Is the 2024 Atera Casar L better than Thule, Kamei, Hapro?

Thule, Kamei and Hapro each offer a great choice of premium roof / cargo boxes. But are they too costly? And is there a better alternative? With summer upon us, we check out Atera's competitively priced Casar L Cargo / Roofbox to see if it's good enough to take on:
Thule Motion XT L
Kamei Oyster 450
Hapro Trivor 440
Halfords Advanced Series
among others! Let's find out!
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