Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works well if you can figure it out.

We screwed it on and couldn't get it to work. Hmmm...must be defective, sent it back, amazon was awesome in replacing it. Screwed it on and that one doesn't work either. Call up Nite-ize directly, they said screw it in. Duh, did that. Finally, after playing around with it for a few frustrating days, I put the batteries in backwards. You know, plus side on the springs. It works now, who knew....not customer service. Hopefully you don't have to go through the same thing after reading this review. Works really well now that it's all figured out.