For anyone who's thinking of getting one, be aware that your TomTom needs to be plugged in to power for the receiver to work. Not an issue if you're expecting it (or always have the power plugged in). Major issue if you're neither expecting it, or normally use your TT on battery only.
Ok I have a tomtom xl 340s and it supports the traffic receiver. I saw one person say it's not worth it. I live in california where there is always commute! What I would like to know is for the most part is it worth it and is it accurate? Oh before I forget does it connect via fm transmitter? Is the sound good or is it like the old fm transmitters when they first came out?