Overall, reasonably fair when it comes to assessing your driving via the telematics box. Obviously sometimes it is required to go above the speed limit for safety reasons (getting out of the way of emergency vehicles for example) and I've never been penalised for this. Obviously if you speed continuously, it will register on your score and will lead to your insurance being cancelled. I'll be honest, I corner fast and I brake late. I still managed to get a discount, my driver score throughout the policy seemed to stagnate at about 73. The only factor that seems to be really heavily weighted is the "dangerous times" metric. Drive after 11pm for any length of time and it will take months for your score to recover. Only other sticking point is that you have to pay £90 to have the box removed at the end of the policy, despite the fact it doesn't belong to you, it resides in your car and you supposedly aren't allowed to touch it.