CONS : I used jSeblod 3/4 years ago (I think) and I liked the extension a lot but it was a pain dans les fesses to understand how it worked. Same thing for this version.. I know you are busy and don't have no money to give to people to write a free full documentation.
But to get a real user guide I would ki.. I mean "pay" a lot.
You should add a poll on your website to see if people would pay for it.
Anyway Ganbatte / Bon courage !