This game was great to play, but considering it was said to be a sort of cross between Fallout 3 and Borderlands, it didn't live up to the hype. The gameplay was great, the graphics and engine are really good, but it only took me 10 hours to complete the whole game, including all races, all side quests and scavenger mission. Also, the open world environment is a bit misleading. Yes you can choose where to go but there's not really anything anywhere except where the missions are taking you. Overall, great game, just disappointing that I will now have to wait for DLC (which are undoubtedly coming) so I can enjoy more of the game.
Edit: Since there is no DLC available yet, (a year later) nor can I find any evidence of any being made any time soon, I would seriously recommend renting this game for a day or 2 instead of buying it. You can complete it easily within 10 hours. Not worth paying full price for to be honest. Until it gets to under $20.