Myself, being overly safety concious, not necessarily for myself, but more for protection of equipment; I would not leave the 'anti-bucking protection' to that device, but would not fire up and plug in the gen. until I did the manual switching.
When I first received the unit, I kinda assumed that the rocker would toggle the other breaker when the first breaker is flipped. It doesn't; the geometry and force required just doesn't happen that way. Instead, it is nothing more than a safety lock that won't allow both breakers to be on at the same time. Each breaker does have to be manually "flipped". I do like and agree with the idea of flipping the breakers first, then plugging into the warmed and operating gennie set. I would back off most all the sub-panel circuits so the sudden load doesn't shoot the hissing pin at the Canooten valve on the mumbling shaft.
