Currently on day 12 of activation and my braking score started at 0, and has never went above 0. I was on a long journey a few days back and was home by 22:07... my time of day score dropped from 100 to 50!!! For 7 minutes driving out of the curfew time!! Pathetic! 3 days back I received an email, followed by a phone call telling me I was at risk of cancellation if my score didn't increase to over 40 within the next 200 miles I drove. Felt like I had my mother on the phone to me telling me off for how "poor" my driving is when I know it's perfectly safe and to a good standard. I do not brake harshly or erratically to explain the 0 score, and the company are telling me the box is working perfectly! Scammers if you ask me!!