We have had TomToms for three years. I have used others at times, and the only one that comes close to TomTom in ease of use and accuracy is Garmin.
I have also downloaded maps from the TomTom website, used their support line when I had a query, and can't fault them in any way.
They are Dutch, I think that says it all. They make what is arguably the best electrodomestic equipment (Philips), run one of the world's best airlines, and a well organised and friendly country!