I found Smartmiles through a comparison website, I entered my details and included details of a speeded offence. I received a quote and I paid the full amount. The black box eventually arrived and my dad fitted it. Then came the bad news, Smartmiles stated I hadn't told them of my speeding offence and now my insurance was going to cost over £1200. The original quote was for £680. I cancelled the policy, but they charged me nearly £280, £150 for the black box, £45 cancellation fee and I'm not sure about the rest. My advice would be to avoid this bunch of thieves.