MMMMMMM dessert... (/Homer Simpson)

Only having used the "hook" style once on somebody else's boat, I can't comment on the relative speed between the styles. Being used to the keyhole system it doesn't take me long to hook in. Unless my shirt comes un-tucked because as I mentioned in a different post if that happens then it tends to bunch up in the keyhole. OTOH the one time I used the hook style I put a hole in my shirt with it so I guess ya takes yer chances.

I bought two harnesses, one for me and one for the little lady; same style. Another advantage of they keyhole type is that people with hook harnesses can still hook onto the ring (if you get the "can't miss" style.)

I'm thinking about attaching a hook to a ball with some epoxy so that if I'm going on other peoples' boats I can use my harness and just duct-tape (or something) the ball-hook into my keyhole (so to speak); if you know what I mean.