Instruct: Classify the given Amazon review as either positive or negative.
Query: Poor Quality

Ordered two 9542 dimmer switches. One switch worked OK, the second did not work. Tough to trouble shoot since it took a while to validate there was no issue with the wiring. Lucklily, I had ordered two and finally could test each switch in both locations and validate one of them worked ok, and the second did not. Not able to exhange via Amazon, only return and then go out and re-order another one.