Thanks to all the replies.

Sorry 'bout the typo- meant to say 'don't ask ME why'

Each type full or sit harnesses each have very inherent dangers!
There have been threads on this.
In a nutshell- the a full has the hook caught or wrapped around a thin line in a turtle situation- well remember someone's brother in a Tornado event drowning once? I had always liked my Murray's sit racing harness cause I always figured I could get it off easier in an emergency.
Yes-I know about the ball instead- have you seen many in use?

As Mark said, when it's getting nuclear, the boat on its side is doing 4-5 knots, you get it righted with the kite snuffed, sheets loose, and the top of the back is like one Major Sea Anchor. Been there, after you ran a chute for hours straight your arms are a bit tired and in the distance race situation, things can go bad real quick.
With the forces encountered in this situation, even your PFD and/or rash guard doesn't seem to help in extreme conditions.
Luckily, I was finally able to get back on the righted boat- but
I swore I'd never use a full one, and for bouys probably still will use my Murray Sit racing-VERY comfortable and with over 10 years of heavy usage (not me being heavy) I'm going full for my distance racing.

Maybe a Magic Marine or Evan a Murray's full.

AND I agree a hook on a keeper that slides on the chicken line and tightens down under tension is much safer in an emergency than a tightly locked in cleat on the spreader bar.

Sorry 'bout any typos, on my IPhone