Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: don't use with Insta-Gator truck rack

Bought this for Thule Insta-Gator truck bed rack.Two reasons this was a bad idea: 1) it didn't work. Not even a little. It's supposed to engage the sliding hook arm release lever, but the internal plastic bits don't quite mesh.2) The Insta-Gator itself works well as far as it goes,and I like it, but even if the lock worked, it offers zero security. To start, it only engages the front wheel. And while the metal parts are quite rugged, it relies on easily-defeatible plasticware too hold it to the truck and to hold the hook arm in place. Lock-wise, you'd be better off with a cable lock tied to the truck.