It works as advertised. Nice rolling motion, pretty strong. My one complaint is that if you arrange it so that you get real coverage at the base of the back, it doesn’t come up quite to the top of the shoulder blades — certainly not to the base of the neck. I’m curious to see how long it will work before the considerable strain on the little rollers causes it to break down. Certainly no electrical or control problems so far. Good price.

April 2009. The Clapper has been around for ages, and everyone can chant along with the infomercial, “Clap on! Clap off! Clap on, clap off, the Clapper!” And while the Clapper — a plug-in on/off switch that is sound-activated — is about as easy to use as its slogan implies, most users say that it works a bit too well. The Clapper has a tendency to activate at even the slightest noise, causing the lights or any other appliances plugged into it to constantly turn on and off. Due to this noise sensitivity, many reviewers deem the Clapper impractical for everyday use. Other complaints are that it doesn’t work with lights that use fluorescent bulbs, and some users have even had the Clapper cause an electrical short in their home.

Those with mobility problems like the Clapper, as it gives them the ability to turn the lights on and off by making any kind of noise. Some also like using it with switches that are hard to reach, primarily Christmas tree lights.