It's a good pruduct allows you to tell how much you are paying for electricity on individual devices,and you can set it to see how much it uses overnight, useful to check how much standby costs on a device when you know you will be asleep, But the problem is, the only way to clear the readings ready for the next device is to reset the unit, then you have to re-enter all the prices, reset the time etc etc, this is a draw back. the display can be a little tricky to read as well, not all plug sockets are in places where you can easily read the display. but for the price you can't complain too much. If it wasn't for that I would be giving it 5 stars, as it is, 3 is about right.