I was worried about the ease which the hooks seem to release so took some care to make it feel secure. Within 3 km the hooks disengaged twice. The first time rolling over a pedestrian crossing ramp the strap kept it on the bike and I was able to stop and correct it. The second time I was going down a hill, hit an asphalt bump from a root and I couldn’t stop in time. It started hitting the ground, spinning and getting tangled in the wheel as it twisted around the lower strap. The hook failed and broke. The strap broke. It damaged my fender and bent a few spokes. Was able to convert it to a backpack and get to work but I’m returning this. Loved the storage, layout, ease of conversion, comfort, and definitely protected my laptop, but I have no trust in this hook system.
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