Janos (Ventura) sued Kyle for fabricating a story which is pretty ironic considering that Janos himself has been embellishing or outright lying about his military service for decades.
http://www.sandiegoreader.com/news/1...ender-ventura/
Note that his article precedes the Kyle suit by more than a decade.
As for Kyle, I salute his service but he had a penchant for telling tall tales, too. Read the book, I would call it "ok" but not great. As for the movie the only thing you can say is that it was better than "The Hurt Locker."