I have a black box insurance with Flux Direct, since having this I have had neumerous problems, the first one being that my car was taken to the garage, the mechanics took it for a test drive which was over the speed limit, having rang Flux the next day explaining the situation, they fully acknowledged that it was the mechanics, however this has still gone down as one of my "3 strikes". Before this I had a "caution" through whilst getting my car down to the garage, which is very interesting to hear as my car would barely run nevermind speed. The box itself is very sensitive, it is impossible to always be at the correct speed limit due to gradients in the road adjusting the speed of your car. When I asked to know all of my up to date speed records, I was sent through a link showing all my driving destinations apart from the actual speed. Apart from all the above reasons I would like to state that the box is a bad idea for anybody debating to get one as you will be constantly bombarded by other road users shouting abuse at you and getting dangerously close to the back of your car, not to mention them trying to overtake. You are more likely to be involved in an accident with the black box then you are without one.