This Inforad was installed in minutes and use is fairly intuitive. The device is rather nice and very convenient to control wheel. After I registered, the machine works great (however, the 2 per month should have been avoided). It's been 2 weeks since I use it and the alarm is reliable enough (about 90%), this is pretty good although there are 10% of mistakes too. For my part, I will use it not systematic because the sound to alert the dangers becomes annoying. It is basically a good gadget but I find this excessive subscription.