Waze all the way! I used to use Google Maps, but once it stopped recognizing my GPS after an update, (Which it updated only hours after arriving in Hawaii, which is terrifying not having a gps in a foreign area) I searched for alternatives, and Waze seemed to be the best. Months later, I still use waze, even though Google ended up fixing the "No GPS signal" bug, Waze has reporting tools and reports which are extremely useful on busy highways. In Honolulu certain times of the day the shoulder lanes open up for traffic, and getting a notification a half mile ahead of a stopped vehicle in a traffic lane is very useful!