No prob,
I live in the Washington, DC area (traffic insanity!) so I haven't gotten to test it out as in-depth as I'd like - it's just nearly impossible to go fast enough with so much gridlock

So
It is built into the GO 730, but you can subscribe and unsubscribe whenever you like. That helps because it lets you try it out without committing (no contracts or anything like that).
There are also some great vids up on YouTube that TomTom owners have made themselves. Take a look at this one, which shows the safety camera service in action:
http://www.youtube.com/watch?v=_PDe7rLD7ts