I read some reviews that people installed them and couldn't get them to work and even their licensed electrician couldn't get them to work. I don't know how skilled some electricians actually are, but the only thing to remember about this product is that it needs a neutral in addition to the hot and switch legs. It's clearly marked and explained. Anyone who understands simple electrical principles would know this. The night light needs a return path for its power. Depending on how your 3-way switch is wired, you may not have a neutral present. That was my case, so I used the ground for the neutral, which is perfectly safe since they're tied together at least at the breaker panel. I like the adjustable night light levels and that they turn off when there's other light present. The switch is stylish, yet simple.