The bicycle directions on google maps routes on lots of non-roads and is worthless for touring. However, the bicycle view shows all bicycle paths and is very useful for helping you route towards paths if that's your thing. Walking directions are suited very well for touring, but will still require you to go through turn-by-turn and make some revisions to suit your touring style. Minimizing the number of turns is always good for stress-free riding.

Using the street view is very useful because there are lots of unmarked roads out there and checking how a road will be marked ahead of time can be extremely valuable.

Printing out the directions with any potentially confusing turns shown on the map thumbnail avoids complications as well.

Paper maps generally result in busier roads, but the freedom to improvise makes it my main routing selection. Having said that, whenever I plan on going into an urban area I always use google maps to get me in.