WEMO insight home automation switch

Anyone used these? Nige picked up a Tesco technology mag and they are advertising them, allows you to connect a heater, lights etc to WiFi network. We got a big leccy bill for the period we were away over winter because we had to leave our electric heating on, it was timed for hour in morning couple hours afternoon, for Feb, March, then our neighbour turned them down to frost protection in April. But still a big bill. Looking at these one set up we can control via internet app, so by checking weather forecast could just turn on if it's cold?

be interested to know if anyone has used them

thanks Lin