After a prang you're choosing a body shop stressed, on the insurer's clock, and usually for the first time. TradeScore assessed 5 Perth smash repairers on public data so the choice takes minutes.
Insurer relationships don't move the number — only the data does.
Star ratings and review counts from Google.
Check your policy — many allow choice of repairer. A high TradeScore is a useful second opinion on an insurer's suggestion.
Scores are recomputed from fresh public data every month. Nothing else moves them.