Im pretty happy with my gobi's(atleast the side ones). Have not done alot of offroad with them so cant say anyting about that. The topbox flew of during a gravelroad run hince the homemade hinges on the picture and the straps just as a precaution ;) , i probably forgot to lock it with the key or something else happend, i had ridden about 30km's on pavement before the gravel. But the key mechanism works now atleast. The side bags are really firm in place, but the box has never been, you can wiggle it back and forth when it is locked in place and it flexes the plastic.