Insanely fun.
Hard to use as well due to the slow projectile velocity even with Lesmok; this is good! Makes harpooning from 800m (I haven't gotten a hit yet but I'm working on it) rewarding for skilled gunners.
I've had some silly fun doing a ramming Pyramidion with double front harpoons and moonshine
Is there a speed limit in this game?
However I have a feeling that just as the harpoon is excellent against low-mass ships (even the 1.3.5 harpoon was enough to drag Mobulas into walls), no sane captain would mount one on them either. GeoRmr tells me that the Squid is an exception due to having enough engine power to deal with this issue.
I am excited to see if I can make the harpoon work as more of a tactical engagement control tool, able to prevent an enemy from escaping, close distance in 5 seconds, and readjust positions of ships.
As for dragging enemy ships into terrain, the 5 second window to move your ship in a position to do so is tough to use-I need more experience with it on Paritan and Canyon to see if I can make it work. Then again, this is good, otherwise consistent drag kills would prove super frustrating for the enemy team.
So far so good, but I see how it could be frustrating for newer players to counter when it's on the side of a galleon (for example). No escape, Hwachas and carronades.