I'm about to venture into the GPS computer market. This will include cadence and heart-rate monitors. However, I'm also about to upgrade the old phone, so this could be an opportunity to get seomething suitable for the bike-related-stuff and save on having to buy a dedicated device.
Any comments or suggestions? Is this a good idea? Are the proper bike computers/gps much better than using a smart phone? What sort of interfaces would be best with a phone and do you have any recommendations?