With text-to-speech voice guidance and turn-by-turn voice prompts, this 5" TomTom VIA 1515M 1EN5.052.08 GPS offers hands-free navigation assistance, so you can safely and easily reach your desired destination.
TomTom makes great products. They are easy to use. I find the lane navigation helpful. The screen is big enough, so personally I don't think the bigger version is necessary.
I gave this one back though and got the TomTom Start 50M instead. I realized that would be good enough and I don't need the maps for Canada etc.
The VIA 1515M has a crisper screen, the cable is located in a more convenient spot and it was quicker to attach and reattach. Also, it showed the speed limit more frequently, so it seemed as if there is more data available for the software.
If I had the extra money, I would go for this but because the functions are very similar, I ultimately decided that the START 50M is good enough.