My renewal prices have been fairly competitive with the installation of a black box. However, I had a very poor experience with their customer service team while trying to switch my insurance onto a new car, which was denied due to a small amount of paint on the brake calipers (deemed to be a modification). This resulted in months of back and forth and work on my part in getting this sorted. Eventually, I had to physically remove the paint myself and get it certified by the manufacturer before they would retract their decision and allow me to remain on the policy. I think there could have easily been a more sensible way of sorting this, but unfortunately this was not the case in my experience.