I liked it enough to watch the rest of the season, though there is plenty to criticize.
Typically, when you hire a movie director for your TV pilot, you do it to get some visual style and atmosphere to set the tone for the series, presumably to be carried on from that point by the DP. When you hire Jon Favreau, whose specialty is "flat, but competent", that's what you get.
Most of this pilot seemed to want to fast forward through the premise as quickly as possible, with nary a character moment to make us care about these pretty faces or tell us why we are watching a TV show about them. The details of the world were so minimal they were nonexistent, except that the dirt in the middle of the town square is the best place for your corn crop.
Blonde Main Character's initial optimism about her fellow dystopians was pretty damn funny. "They can't all be rapers! They just can't be!". Immediately after almost being raped and killed.
By the end of the pilot, it felt like it was just good enough, with just enough potential to stay intersting. However much Kripke had to do with it, Supernatural always nailed the progression of it's season arcs, and improved steadily (at least through season 5 from what I hear, I'm about to start that one now). There is plenty of time along the way for the good world building details, interesting plots, and Blonde Main Character's growth, Jared Padalecki-style, from "Ehhhh...." to "Alright, I guess.".
As an aside, this setup also has a lot in common with my beloved, short lived Harsh Realm, Chris Carter's series from 1999. That one also had a scrappy band of outsiders vs. a self-styled dictator in a semi-Road Warrior type situation, where gas and bullets are the best currency. Except in that case, the pilot set up the world smoothly and elegantly, delivered kickass action, badass D.B. Sweeney, and Terry O'Quinn being a total boss as Santiago, the dictator.
Sure beats the hell out of Revolution's dictator, who looks at a piece of paper with really bad news, and then just kinda sits down in his chair without reacting. Gripping!