I'm in the market for a roof box to fit my Mazda 3 hatch. 

Currently i'm leaning towards a Hapro Zenith 6.6 (6.5 is the older version most people are advertising) as it's a lower profile than most and won't look like i'm carting a cow on my roof. 

Has anyone got any experience with the Hapro brand? Or perhaps a different lower profile option I should look at?

The internal height can't really go below 36cm as that's the height of our stroller and it will be going in there rather than the boot.