I like to experiment with fins and see how they affect the boards performance. Have tried lots including the VMG, Gerry lopez, Eric Terrien and most recently the Danny Ching fin ( I wait for them all to go on sale and buy them or steal/borrow them off friends

) The Danny Ching FCS fin is a solid fin, that offers good drive and tracking when paddling hard and still allows the boards to turn quite nicely to steer on runners and on pivot turns. I've used it in a couple of boards so far, and as DJ said the best fins are the ones that you don't really notice. All of the above fins have been really positive. I have used some average ones as well like the FCS triangle cutaway (huge too much drag), and 4 inch dolphin fin (too small no drive) not to mention some of the old fins that came stock with the older boards. Any ways sorry for the long answer to the above q re Danny Ching fin - good fin! It all depends on what board you paddle and what conditions you paddle in.