It took me a couple of sittings, looking at the game, getting a tiny ways into the game and saying "nah, boring" before I became completely consumed by this game. Then, I spent most of my freetime for the next week playing this game, and the story and the playstyle are fantastic!
I usually prefer open-world RPGs and don't like linear RPG's, but this one made me change my mind! The game combines open world feel with a linear play through. There are a couple world sections that you can travel to at different times. Each section is worth exploring as there is a lot of fun side quests and loot. However you are in a fixed storyline in each of these sections and often returning to old sections is pointless. On a scale of Open-world to Linear this game falls as a little more Linear than Fable III (You have a central hub after a main questline and can go to different areas to pick up stuff you missed, but once the end sequence of the game begins there is no going back).
The BIG downside to this game is that there is 0 replayability. Which is a shame, because it really is fun to blow stuff up as a dragon.