Instruct: Classify the given Amazon review as either positive or negative.
Query: Works perfectly

I had thrown away too many of the cheap $15 Heath-Zenith motion detectors. Those cheap ones always went bad after a light rain shower. They would turn on at random, even during daylight and waste energy. Sometimes they would not turn off.I finally decided to spend the extra money and get a better one. This Steinel unit has been in service for months now, and has been very reliable. So far, I am happy I spent the extra money on it. I am using a 150 Watt incandescent lamp as the load at this time. The unit says it is compatible with the fluorescent lamps, so I hope to use a fluorescent lamp with the unit in the near future.