If you gotta ask, the cool factor is WAY higher and sister hooks don't seize up when you pull on them. They also don't put a big turd in the middle of your sheet or come untied.They're also alot faster to rig and unrig and give you a static setting that's always the same. For cruising, knots may be fine, but I don't like it on a race boat.You can tie knots in yours all you want.

Tback,
I have ground on the traveler with the sister hooks taking the load with NO problem. If your traveler is long enough it shouldn't be an issue. I made my traveler a little longer because in heavy reaching conditions (alot of the Tybee,last year) I found myself holding the sister hooks with the full load on the traveler. Not real comfy on your hands, but an extra foot or so solved that problem.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White