These are by far the easiest to adjust on the cleat, and by far the longest.
I've got Chinook race lines but even at their longest setting they are at almost the minimum length setting here. The chinoo,k cleat is also often very difficult to loosen to adjust.
They are loose on the boom because they don't have velcro on the attachment. I have to shimmy them just about every jibe. But, that also means I can tweak them fore/aft very quickly to get the perfect balance.
I've only used them on the IQFoil setup but they may be good on fast freeride setup as well.