The Verizon guy ("can you hear me now?"-no not that one) said telephone GPS isn't as good as a regular, dedicated instrument. That was about 1.5 years ago, so maybe some are better.
He's also the one who talked me out of the Droid because he said the jostling on the bike would be detrimental. Turns out my step-daughter has dropped hers many times & it keeps works. Who knows?

