It took me more than half an hour to install one of them. But that is because of my mistakes. The labels and instructions are clear, but I didn't get it right until after many tries. To reiterate, make sure you connect the wires from the wall to the "line" side, not the "load" side. Also, make sure the hot wire (mine is black) connect to the "hot wire" and the white wire (mine is actually white) connect to the "white wire". Sounds obvious, but it took me many tries because of my brain malfunction. The product itself is flawless. Finally, The long distance between my bathroom and my garage contributed a lot of overhead. Having a second person sitting in the garage helping with turning on/off the switches in the circuit brake panel would have saved me a lot of round trip time.