I live in New York City and am trying to decide whether NavTraffic is worthwhile. I don't drive too often so am probably wavering against it, but if it works well in Manhattan and during the occasional trips to Long Island then I will do it. Does anyone have any thoughts?

I live in Queens and use the NavTraffic for my jaunts across the city to NJ. NavTraffice definitely works well with tunnel traffic and traffic on the FDR and the West Side Hwy in Manhattan, but I do not believe it gives traffic data for local streets