Bigger is better, according to TomTom, but will a larger SatNav device get you to your destination?

Anyone who’s read my previous sat nav review on the TomTom Go 2050 will know that that little gadget won me over. So when I received an invite to attend the launch of their new Via range, specifically the Via 620, from the rooftop vista of Ku De Ta at Singapore’s tip, a place where most self-respecting GPS gives way to sonar, I was naturally intrigued.