The Serenity system is potentially not a bad one and the book is very pretty, maybe the best looking RPG I have seen bar some small amount of second rate interior art. but it has huge problems with editing. It reeks of a product that was rushed out prematurely. Subsequently support has been slow – in part because of the need for everything to be approved but the absence of even errata is discouraging, especially in a book that needs it so badly. I rather suspect future support will be minimal as they have a new and potentially rather more lucrative cash cow in the form of BSG.
Some users are saying that they are going to have to buy the BSG book just to see what a finished version of the Serenity system would be like.