I need a rear mounted bike rack for my Zafira to carry 3 bikes to France this half-term. I have narrowed it down to this [[http://www.halfords.com/cycling/bike-racks/rear-mounted-bike-racks/exodus-rear-high-mount-3-cycle-carrier-clamp-fitting]] or [[http://www.halfords.com/cycling/bike-racks/rear-mounted-bike-racks/thule-clipon-9104-bike-carrier]] Any suggestions as to which is better? Thanks ps. I can't afford towbar or roof options!