tldr, My family of four (kids ages 10 & 11) had an amazing time!
Wow! Where to start? From the first moment, I reached out to the very end of the tour, Maui by Storm were the consummate professionals. We did the all-day reverse Hana tour with Luke as our guide. It's a little scary to book a day in a car with someone you don't know. Will we get along? Will they want to kill my kids by the end of the day?
Happily, I took the leap based on the other reviews here. The car was super plush and nice to sit in. Our driver Luke was funny, kind, great with our kids, and so knowledgeable about everything, Maui! We could not have asked for a better and more fun day. In addition to an excellent itinerary, Luke accommodated all of our special requests as we went along and knew all the best places to stop. We jumped off waterfalls, hung out at the black sand beach, and visited all kinds of cool spots that I won't detail here to keep the surprises coming for you.
I cannot recommend Maui by Storm more; you really don't want to do this drive yourself; at a minimum, whoever is driving requires razor-sharp focus the whole time and will miss all the beautiful sites; beyond that, you'll miss all the fantastic knowledge and information about the place you are visiting. You can't ask for a better company to do the tour with.
In summary, if you aren't considering using Maui by Storm for your private luxury Hana tour, you're doing something wrong.