We really enjoyed using this app. We went about 1/3 of the way one day one day and went back for the entire route the following day. Only because we decided to go to a luau at the last minute.
The road to Hana offers beautiful view, trees, plants, waterfalls, a black sand beach, and a few small caves to explore. It is a must if you are in Maui. Well worth the drive from any starting location. We dive 45 minutes just to get to the starting point and we did it again the following day.
The guide on the app is great. He is entertaining and we really enjoyed the history that he provided on the island and the culture in general. He was spot on as far as locations as well.
I can't say enough! If you want to move at your own pace; fast or slow; this is the way to go!!!