Wouldn't recommend a purchase at this point. Doesn't keep the bar high enough during a fight.
Edit: For some reason I don't think it works very well on mac. However, I loaded into windows to try it and its working flawlessly. Not sure why that would be but its working great on Windows.
I know, and even with that ticked it did not drop the tuna. It would start running to the bank with tunas + swordfish in my inventory. Was good for others though.