I've been using my TomTom Go Live 950 for around a year now so I've had plenty of opportunity to thoroughly test it out. What sets it apart from other sat navs I've used is TomTom's HD traffic service. The traffic services on other sat navs I've used have tended to be of limited use - I found that information updated erratically and only showed problems on motorways and trunk roads. By contrast, the HD traffic service uses a different system gathered from TomTom devices and anonymous information from the Vodafone network which allows traffic jams to show up even on smaller roads. In my experience this works well, with the device more often than ...  Read the complete review