Hope it's more reliable than the average auto pilot which often gives up after a couple of hours under sail. You'd feel a bit stupid bobbing around under full sail unable to make any adjustments. Presumably it would also drain your batteries so you could have the additional risk of being unable to start the engine - but I guess they must have thought of that.

Must admit the power drain angle worried me too. As boats get ever more complicated and power hungry we will all end up motoring just to keep the batteries charged to run all the systems which a few years ago we managed quite happily without!