First of all, the basics: the Edge 500 is the successor to the Edge 305, though could perhaps be best seen as a stripped-down, smaller, lighter version of the 705. It really is a remarkable package: light and compact, yet offering 41 options to choose from displayed on up to eight customisable fields per ‘page’, of which there are three available for full customisation.The main point of departure is the lack of GPS mapping; though for me this was of little importance and if this is something you consider essential then you are well-catered for by the new, touch-screen successor to the 705, the Edge 800.