Rode the Boat a few times when it was in operation.  It took too long compared to the express buses.  Used to live in Kapolei back then and the Country Express took 40 minutes AM and 1 hour PM.  The Boat took about 1,5 hours.   The Superferries, on the other hand, would have been an interesting alternative as they are much faster and could carry vehicles.  Ironically, we are paying $10 billion for rail which will take longer in total travel time than any previous transit system implemented.  When my Tesla 3 arrives later this year, I am driving in with the auto-drive feature and parking free in downtown.   My Leaf does not have the range for a comfortable daily commute.  BTW, today's morning commute via Mililani Express took 41 minutes.  There is nothing wrong with our efficient express bus system yet we are replacing it with an archaic mode of transit that will double the commute times of current public transit users.  Most of us plan to drive rather than use rail.