Thinking of having the dealer install this on our almost 5 month old 2017 CMAX energi. The box is supposedly removable, so would only be in place when we take long trips or really need the space. We do have the panoramic moon roof, but the box shouldn't be an issue if its weight is on the rails.
What has everyone's experience been with long trips in the C-Max -- especially w/ 4 people in car. Did a cargo box on the roof make sense? Any problems other than a modest reduction in efficiency/driving range?