Instruct: Classify Amazon reviews into positive or negative sentiment
Query: pin configuration not secure

I don't have this product but I have the Allen Premium-5-Bike-Hitch-Mount-Rack. They both have the same pin configuration (from what I've seen on the installation video). The pin configuration is NOT FULLY SECURE...and the clip could eventually slip off due to vibration or side-to-side movement. The design is flawed.On the bike rack, the pin configuration is just a "backup" to another fully secure "primary" pin. But on the adapter it serves as the "primary" pin. I was thinking of buying this adapter to go with my bike rack but will not buy it due to the high risk pin configuration.