Its a very very useful and practical thing in a car...instead of bodykit, mugen grill and useless stuff like these one must go for utility and its a real comfort product...in winters its an executive feeling as well as practically comfort that you being in your bedroom can see the internal temp of your car and start the car right from there with a push, the car will be warmed up and then u r simply good to go on a cozy car.same is the case in summers, your AC will cool down the temp when u ll reach your car.But one must go for steel mate 2 way system.I have this in my 2001 civic and working like a charm that too flawless.