I recently got my first smart phone--The Droid had just come out, but we were having trouble with Verizon at our home location. We had dropped A T & T about 6 years ago, because of poor reception--but now it is better than Verizon, at our home. In an area where we would often drop phone calls, I have good internet coverage on the I phone.
As a phone it is OK, but not great--but just as easy or perhaps easier to use than standard flip phones. (Marie got a flip phone, and I found putting in contacts, was easier.
I haven't used any boating apps yet, and the GPS is only fair, but acceptable for some applications. I still use Garmin Nuvi for car navigation and POI--but the I phone is better at POI, plus it will bring up information, phone numbers and then dial if you so instruct. Also the Blue tooth phone works very well, and makes it a better phone.
OK--what can I do with my I phone that really helps me? First weather, including hourly forecasts, and radar--very handy in the Gulf area, when you are away from TV and the internet (but are in cell phone range). Yes, tides are excellent. Wall street Journal, on tap. Conversion tables, Stock and commodity prices and if you want to look up an obscure stock its there. It will also take the place of my I pod, the palm pilot etc.
The other issue, is that most of us "upgrade" our phones every two years. I suspect that I phone will be G4 and with a lot more features when I go for the next up grade. I can always change to the Droil or what every is the latest then.
So far the cell phone coverage is not quite as good in rural areas--we have traveled to Tenn and MS, with a few blank places, where we always had Verizon. I think that there will be some in our cross country trips--but in habitated areas, I think that Verizon and A T & T are close in coverage.
The other question is why has Apple done so well in the last couple of years? I think it is because of Vista--and I just put Windows 7 on a couple of my computers--better than Vista, but still some glitches. Apple is much smoother still than Windows 7. My only concern is what happens if Steve Jobs goes away...?