Have a question for Auto PFD's users?

Just got back from marine Store and re-discovered SOSpenders; Belt
models. I figured I was wrong to band them from my Bow man.

They look pretty damn good. After asking some questions I'm not sure?

I find out that they blow up from the belt and have to be pulled over
your head. Has anybody that own a model actually deployed it
AUTOMATICALLY? from a squat position or from a hands and knee position?
I couldn't get a demonstration; not even a manual inflation. I guess the
refold isn't to easy?

They look good about not pushing your chin up but after talking, I
didn't get much information about Auto Inflation if you're on your knees
setting the Tack of a head sail. Does the thing inflate between your
hand and face, making working impossible or can you continue working
with both hands???

After posting and asking around with other owner, I'm shocked at how
little is known about them by their owners.

I need some answer, PLEASE???

Thanks,
Ole Thom