If you get one make sure its insured especially on a 24 month contract because there only good for about 500 charges on average and they need to be charged everyday mine is only about 6 months old as it was a replacement for a faulty one i had and the battery is getting worse apart from that they are really so i would believe the hype there really is an ap for everything there is even one that measures bhp etc the g-force on the accelerometer etc and when tested against a stand alone unit it came out better and it was only about 3bhp out compared to a real rolling road printout carried out before the test i cant remeber what its called i'll find out and let you know