The cocenntion, if you have a good signal, will probably be about 200kbps. You probably have a monthly download limit (which includes streaming video from facebook or a movie/tv site).Other than that, there's no difference from using that notebook in your house. You're connected to the same sites, via the same internet, and you can do the same things. Just while you're on the move. (PLEASE don't try to access the internet if you're driving, or talk to the driver about what's on your screen we've already had enough car accidents for all of 2010, and it's not even Christmas 2009 yet.)