rlspringer....
Depending on what you consider really big boats, it's not unusual to take you more than a day to detail one correctly.
There is no way for any product to claim its longevity without considering the variables; i.e., where the boat is kept, what kind of water, how often it is washed, the outside weather conditions, overall condition of boat.
I can guarantee you that our wax will cut your detailing time dramatically. It will last as long, if not longer, than "the best you have tried" under the same conditions.
Do you usually do boats or are you just "branching out" from cars?