The only one I have had stolen was a freshly rebuilt, very Red and shiny Ser3.
It had just about every cunning device known to man on it to prevent theft, Police reckoned it was just dragged onto a beavertail.
Had an agreed valuation, insurance fought my claim all the way.
Have had scruffy and cheap ever since, still with cunning devices, not had a problem, mind you the choice of loud colours might have helped.
Have drilled a hole in the brake peddle and pulled security chain through steering wheel then locked with Chubb security padlock through the peddle, bit of a pain but seems to work.
coop