It saved me buying an aerial and pole with fixings and possibly cable. Then i have to use a clamp and possibly drill fixing holes.
I believe the signal here is good but its very windy and quite often i see aerials that have moved.
It is the best snake oil product since owatrol.
I use the pole that came with the boat or sometimes just the boat hook, to support a full size log periodic aerial. In strong signal areas if feeling lazy I just lay it on the roof. The pole drops neatly into the front bulkhead mounted towing rings although appreciate many boats don't have these. The coax feed from aerial plugs into an external socket, so no need for cables through windows.