It may be able to count Carolines
...
...but it doesn't appear to do mapping or directions.
I'd say it's not worth it, if you ever want to try following routes.
If you just want a speedo that will show you, on your PC, where you have been, then £50 isn't bad, I suppose.
I'm set up with:
a secondhand Garmin (at less than half that price) which does directions but not mapping.
a phone that does mapping, GPS and can be charged from the dymano (but isn't weather proof
) for less than £100 including the dyno charging bit.