Zero out of ten / DO NOT BUY THIS!!! Got from Halford's last year thinking would be quality given endorsed by RAC but what a waste of money. Have had to replace unit twice in past 6 months (always a long wait in Halfords store) because software keeps encountering a fault, but as I can't read Chinese I'm not sure exactly what type of fault. This fault made me more than 30 minutes late for a meeting the other week so have taken back for complete refund. Going to get a Garmin from Argos as Halford's website is unreliable.