So being a young driver, 18. I bought my first car. I joined carrot insurance as it was the cheapest at £2000! I realised I needed extra miles, which cost me an extra 500! With free administration I must say as it was in the first 2 weeks. 1 month later I moved house. It cost me 220 quid to change address...how can anyone justify this? It's ridiculous. I am 18, student, it's not like I am a millionaire with loads of money. Onto the black box itself, well inaccurate is about right. I can swear down that I was doing the speed limit but according to black box I wasn't. Oh, if you are likely to go into minus score then be prepared for a warning and then cancellation. 2 weeks in red they will cancel you, 4 weeks in red over a year they will cancel you. When I say red, I mean -0.1...i would recommend more than as I have friends on that and they are much more lenient. Good things, support are quite funny, they get things sorted pretty quick in my experience