I am curious what people’s impression of this switch is. I only have a single Cooper RF9540 switch installed because it seems to be well regarded and one Amazon reviewer did an in depth comparison of four switches but liked the Cooper the best. Everything he said about the Cooper was true in my experience so I trust his judgement on the other switches. It seems like the only complaint is he could only dim to 70% level. Others complained that the switch is so big it is difficult to install next to another switch. It is tempting as this is half the price of the Cooper switches. I want two more switches to complete my downstairs control. Tough decision.
After installing a pair of GE Link Z-Wave dimmers (that use wiring terminals and have performed flawlessly) in my family room I decided to try cutting costs with a pair of WD500Z-1s for the front porch and entryway lights. In addition to being more difficult to fit into the box…mostly due to the use of pigtails and wire nuts rather than terminals…one of the switches never functioned, while the other (wired identically) worked fine for a couple of hours until it began to cause all 4 bulbs it was controlling to begin flickering at 100%. I pulled up the ST app and found that turning the light off and back on caused the dimmer to come back on at erratic settings ranging from ~30%-60%. I pulled the switch out and checked the wiring to make sure I didn’t have a connection that had come loose. I didn’t. Putting it back together and trying again gave the same results. It worked fine for a couple of hours and then resumed the flickering. I tried swapping out the LED bulbs for incandescents, but that made no difference. After 3 days of this the lights stopped coming on at all, even though the switch responds by turning off the indicator LED.
I believe I’ll be picking up some GE Link dimmers now.