After the initial frenzy and excitement following the release of the iPhone 3G has died down, there are now many customers emerging on Apple's official message board complaining about 3G coverage - or lack thereof - on their new handset.
Maps app is used to get directions and location maps and it is recognized as helping tool in various ways. You can follow the directions while travelling but there is another effective way which is print out of directions. This is more beneficial because you will save battery of your iPhone or if you go to area where network coverage does not respond well, you can take advantage of hard copy.