Fast depends on where you set the left stick. The Shark is more efficient than a Stick and so flies faster for a given amount of power.

The cowl requires that you cut clearance holes for the muffler, glow plug, needle valve and idle needle. The Shark's is no more difficult than any other cowl, but it's still a pain.

The Shark tracks better than the typical Stick, and doesn't have their annoying habit of dropping the tail on landing approach.

I liked the one I had for a while, but I had to give it back to the owner.

Jim