The IPhone uses what they call Assisted GPS out of the box. As my comrades have said it uses GPS and Triangulation to more accurately fix your position. I believe Apple is currently shooting down all turn by turn apps probably because of a deal they may have with another company to provide or it is planned to be native in the next model of the phone. The GPS has been very accurate for me but I have only tried in major cities. (Anyone thinking of buying the IPhone should check the coverage area to make sure they have good 3G coverage.) I can’t imagine a stand alone GPS would be practical for someone unless they do a lot of traveling in their car. If you are in your hometown I can’t see the need for turn by turn (I also couldn’t play my music very loud). The IPhone does work great for planning your route which is all you really need in a town you are familiar with - IMO.
GPS however is just a small feature in the grand scheme of the miracle that is the IPhone, Apps. Let’s see now, I have only had mine for a month and let me see if I can put into words how amazed I am with this. It is a Mobile computer that just happens to be able to make calls. It is a phone, clock, alarm, stopwatch, calendar, photo album, camera, world map, weather channel, contact book, note pad, internet browser, mobile bank teller, music player, video player, texting, email, remote control, video game console (1000’s of games), white pages, dictionary, thesaurus, internet radio, ocarina, flashlight, calculator (graphing optional), lightsaber, stocks, vnc, youtube, foreign language dictionary, translator, personal media streamer, facebook, bible, wikipedia, reference guide, voice changer, lie detector, bubblewrap, lighter, whoopee cushion, IQ tester, flux capacitor, netflix, bioscanner, converter, level, plumb bob, protractor, ruler, encyclopedia, tilt meter, voice recorder, seismometer, decibel meter, stethoscope, compass, hourglass, twitter, my space, guitar, piano, drums, organ, harmonica, radio, flute, beatbox, metronome, tuner, cowbell, name that song, violin, recorder, wifi tracker, grocery list, diary, flight tracker, speedometer, newspaper, rss reader, pdf reader, spreadsheets and ebook reader just to name a few.
Sorry about the long winded ad but I am blow away by the IPhone. Unless you do a lot of e-mail and need something with a keyboard (like a Blackberry) or you have a need, a physical need (shout out to Audra) to have the independent GPS, I suggest putting that money towards the IPhone.
Are you talking about paper? Do they still make those?
But seriously, I have never seen a map that holds a candle to a Google Maps style map. They are much more up to date and satellite images are excellent for finding landmarks. Before my IPhone I would just pull up a location on Google Maps and quickly plan my route. I could also print it of if I needed to. Now I think about it the Sodes make a good case for you. If Gaeta had some maps without relying the comps he may have been able to avoid the voyage of the crazy people.