Automatic for me please. I want it to inflate whether or not I manage to pull the toggle.
For more thoughts you can also search the foums for previous threads like this one
, or read the article in the features section
My view is that the inonvenience of a prematurely inflated lifejacket is outweighed by the inconvenience of one that doesn't inflate!
a personal judgement though, but make sure you think it through carefully -- especially with regard to less experienced crew and passengers. Don't underestimate the debilitating effect of thermal shock in cold water either.
Whatever you chose, make sure you use it!
By the way, unless they have changed recently, lifeboat crews only use fully inflatable life jackets on "all weather" boats. RIB crews either have permanently bouyant life jackets or the Crewsaver combination life jacket with both.