Here are the "good" and "bad" on this product...ADVANTAGES.1. This is the highest consumer rated timer among 179 Amazon.com users with a score of 4.8 of 5.0 stars. Competing brands do not come close..2. It will operate with the highest energy demanding devices. The timer is able handle equipment that requires a maximum of 15 Amps, 0.5 HP, or 1,725 watts..3. UL tested and approved..4. There is a maximum of 96 15-minute settings..5. The construction is heavy - very rugged. It is not the familiar light cheap plastic types that are commonly sold in hardware stores..6. At $10, the consumer is getting great value for an over engineered and durable product that will last for years. For the quality, it should cost $20 to $30..7. It is simple to use. First, slide the side switch to TIMER. Second, use a tooth pick to press down the tabs on the clock dial to set the time(s) for the device to go ON. Each tab represents 15 minutes of activation. Third, rotate the round clock dial and position the black triangle to the present time..8. There is no comparison between this product and the competition. Through the years, I have used Intermec and GE brands. These were the only choices on the shelves of Lowes and Home Depot. They were cheaply made; they tend to overheat; and the life expectancy was short. The biggest problem was the limited number of settings. Two or four plastic pegs were provided to turn devices ON and OFF. In other words, the user can only activate the device once or twice in a 24-hour day. These plastic pegs tend to fall off and get lost - rendering the timer useless..The CENTURY 24 product does not have the above problems. Most important, there are no plastic pegs to insert and lose. Just depress any of the 96 15-minute settings with a toothpick to set a various number of activation times..9. The device is grounded for safety...DISADVANTAGES.1. The timer is heavy and big - leaves little room for another electrical device to plug into the electrical outlet..2. The manufacturer, Century Products, is not well known as Intermec or GE, competing companies that also make timers..3. The timer can only control one electrical device...==================================================================================================..UPDATE 1: I was too premature with my praise for this product. Of the two purchased, one went dead after two days...==================================================================================================..UPDATE 2: The malfunction happened on a Saturday. Three hours after requesting that the defective timer be returned for a refund, the vendor contacted me by email. He politely asked for a description of the problem, which I replied. Within an hour, a second email expressed his personal apologies and indicated that a free replacement will be shipped on Monday..The unit arrived a few days later. It was rigorously tested. The product turned my bedroom lamp ON and OFF every 15 minutes for 16 hours everyday. It was OFF for eight hours, because I did not want the lights flashing ON and OFF while sleeping. The testing will continue for the next few days. So far, the replacement timer is working without any problems..The reality is that defects in manufacturing happen all the time. This is normal..What is not normal is this vendor's reaction. It is unbelievable that a company immediately responded to a customer complaint within three hours on a weekend, confirm the issue within an hour, and ship a free replace on the next business day. Such an experience is "an all-time first." I am totally flabbergasted..Customer service like this puts all other businesses to shame. In fact, it must be emulated by all companies...==================================================================================================..UPDATE 3: I was so impressed with the product's quality, versatility, durability, reliability, and usefulness that I purchased four units. In operation for 24/7, they were continuously ON since October 16, 2016. During this time period, there were no breakdowns or time inaccuracies. My lights and lamps were turned ON and OFF without failure.