I admire the ingenuity of the design. It appears a lot of hard work and engineering went into their design. But, I just can't justify changing from something that has always worked well for me to something more expensive. I've never had a clunk stick forward with just normal aerobatic maneuvers. I must admit, I have had one stick when my plane ran off the end of the runway and flipped over. However a good sharp jerk, sent the clunk back to it's original position.
There may a good use for them somewhere, just not with me.
Frank