Bruce and others,
They address all the concerns you all have on there site. Seems to me (from what I read) each dock set up is tailored to specific locations and needs.
Bruce,
In answer to your question, they have a lock down set up for the panels if needed. I didn't read anything about the size of the boat you could tie to this set up, but like others here, cant see this dock being able to handle a 30' or larger boat where they have heavy wind or currents.
I think the beauty of this set up is it is designed to be used where you can't keep the dock in all year, not a permanent dock solution.
Bet this setup costs an arm and a leg!!!!