Not first hand, but have had a couple of friends send their kids in years past.. nothing but good reviews from both parents and participants.
I believe they offer both coastal and offshore (generally Hawaii) opportunities. We see them on occasion each summer.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"