1) Low scores are not representative of driving; the maps the box uses as reference for speed limits has many out of date speed limits. To keep a good score, you would have to drive much lower than the legal speed limit on some roads (e.g. road is 50 mph, and the box wants you to drive at 30 mph, and you have people shouting at you because you can't drive any faster). If you constantly obey the law and disobey the false data used by the box, you will be issued warnings and could lose your insurance, making future insurance policies extremely expensive. 2) Customer service is disgusting. When you present proof of erroneous data by the box, you will be dismissed, laughed on, or told improve your driving or f*ck off in a polite way. Your driving could be perfect and you have all the proof that the error is from the box, but the reps are condescending and rude. You will never be able to dispute low scores no matter what proof you have, and you will be constantly threatened with cancellation and permanent damage to your insurance record. 3) If you live in unfortunate area where data used by Rac are poor, your car will be impossible to drive if you hope to keep your insurance, and Rac will not care no matter how much you complain. If you live in a city area, your score will always be low because they don't want you to drive in urban areas. If you need to drive at night, your score will also always be very low. 4) If you think you can put up with all of this for a discount at the end, you would be wrong. I maintained a score above 95 with Rac Black Box tolerating wrong data and shouts from other drivers asking me to drive the correct speed limit, and it was the worst year for driving I have ever had, Rac mad driving expensive. At the end, I got a discount of 20 pounds. Not worth two sh*ts. Don't bother unless you like being in pain. If you hate someone, recommend Rac Black Box to them.