I did map out a course in Garmin connect on roads I was not at all familiar with and the turn-by-turn prompts that popped up while I was riding easily got me to my destination and backThere is only so much on screen data I can consume while trying to pedal at 95rpm and not get hit by cars

The turn by turn directions works very well.

The Edge 25 by itself will show you totals and averages on screen, as well as turn by turn directions of pre-loaded routes, courses, etc

Strava* Uses common Garmin quarter turn mount, compatible with 3rd party

light+ Bluetooth upload to Garmin Connect and Strava+ GPS seems pretty accurate+ Turn-by-turn course directions+ Phone call Caller