I have 4 of these switches in my house installed 4 years ago. They are great when they work but apparently are not built to last. In that period of time we have had 2 of the 4 switches fail in that they no longer dim, but simply go from dark to full light. For the price, I'm very disappointed in the product. Lutron customer service was not willing to simply send me a new switch based on my word that the switch had failed. They wanted me to have an electrician verify the problem. I ended up buying a new switch for the first one that failed and haven't replaced the second one yet. Buyer beware.