Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Simple and effective

This product is simple and effective. I ordered 4 of them for use in my garage. After feeling my way through the installation on the first one, the others went up fairly easy. Price was decent compared to similar products. Only gripe is that you are limited to your mounting locations by the direction that your trusses run. Amazon's free shipping really helped too. All in all, I would buy them again.