I purchased the TomTom One 3rd Edition over Thanksgiving. Turns out their database is not up to date and they aren't even aware of it! I have sync'd to the latest maps available on the website, yet often Tom Tom has led me through paths that don't make any sense and are miles away from the actual destination. I also like the competition (e.g Magellan's ping at turn) features better. I would avoid buying a TomTom in the US. I hear its better over in Europe.
TomTom - One GPS Navigation System is not recommended by snd2000