Learn the right way to use it- - - - -lots of broken arms, wrists, and jaws have been caused by a kickback from incorrect ignition timing.
Jerry,
Definitely want to learn to use it right, I was wondering the same thing as I wasn't sure if there was any type of kickback that could happen, but have heard of it happening so I know it's a danger.
I don't have the crank handle, and it looks like they go for $40-$50...maybe I could make one myself. There must be dimensions floating around the web somewhere, probably here on Stovebolt.

I was thinking it could be handy if I couldn't get my truck started where the starter wouldn't turn the engine over...can't do that on a newer truck, and most likely because people were hurt starting cars of yesteryear...
I was trying to figure out if it was worth having?
Alan