Honestly, I was shocked at how fantastic this tour app was, and you can't beat the price. This is definitely worth getting if you have access to a vehicle while you're in Kauai. The app was so easy to use. You can easily start and stop the tours at any time; the tours detect where you are via GPS so they will restart wherever you are. The directions were spot on and easy to follow. Each of the 4 tousr contains tons of sites/activities. And the sites they took us to were wonderful - beautiful waterfalls, interesting historic sites, greating hiking trails, etc. So worth it!