Indeed, the TrailRunner software is much nicer than the Garmin stuff. It needs the Garmin stuff (in order to download the data from the ForeRunner), and for that you need to have a good quality USB cable, otherwise the Forerunner will charge, but not transfer data).
So if you have a Mac, download TrailRunner – Mac OS X route planning and journaling for iPhone, Nike+ SportBand, Garmin ForeRunner GPS.
–jeroen
via: Garmin Forerunner 305 GPS – Mac data analysis and blogging | Jon Worth.