I am not insured with Shannons but I was looking after a friend's car that is insured with Shannons which was unfortunately damaged while parked.
Shannon's were nothing short of amazing. In less than 3 hours after the owner contacted them I picked up a replacement hire car - upgraded so that extras that were in his car would fit - and we comfortably drove the 1500 km home.
They also trucked his car to near his home town for repairs.
I will definitely be getting a quote from Shannons when I next insure my own (older, special) car.