Weaknesses: My bike insurance says my bike must be locked through the frame to the rack. I can't do that with this one because it only has a single arm to hold up the bike.
Strengths: Light and well made, the frame holder is easy to adjust.
Weaknesses: Wheel straps hard to tighten. I would suggest some extra bungee straps.
Overall: Ive had a long search for a roof carrier for a Marin East Peak and like a few others this carrier isnt the one. The frame holder will only be suitable for round or oval downtubes - the Marin just doesn't sit securely enough. I've swapped it for a Velovise Pro 511-1. Check your bike before you buy.