I've used the free version for route planning for quite some time. I prefer it to Strava and Map My Ride for planning and especially sharing routes.
Last summer, I coughed up the $6 per month for turn-by-turn directions. Being in a new area, it's been great for solo road rides (I use a tiny bike computer, and haven't upgraded to one with mapping capabilities yet.) I've even used it for driving, since Google Maps always wants me to get on the freeway to go like two miles and I don't find that necessary.
Downsides: Elevation data for pre-planned routes is often off (as much as 500-1,000 ft over 50 miles), directions can be difficult to hear in the wind if you have any hearing problems.