It is clearly labeled as bets... try to determine how to report your bugs to Google so that the product can evolve enough to be useful.
I tried it once, and will uninstall it. It has potential, but as of today Sprint Navigator is superior from my observation.
Google recalculated my route 3 times while I was sitting at a light... including having me back up and go around the block. My guess is that minor deviations in the GPS location are seen as changes of car direction to the software... even when standing still it is far to sensitive to minor changes. They need a routine to ignore changes under a certain distance.