I've changed my mind, in a previous review I gave this game only three stars. This was based on first impressions and because of quite a few technical issues I was experiencing. Now I have tweaked the configuration myself and given the game more time to develop. I now think it's one of the best games I've played for some time.
Graphically it's a little weird, after the tweaks it's one of the best looking games to date (including Crysis 1 and 2) but also one of the ugliest... it's the way it manages textures, when they are right it's exceptionally pretty, when it's it's wrong it's a muddy smudged mess. But like I said, after a few tweaks these moments are rare.
If you're an ID shooter fan you may find some aspects a little jarring... this is an RPG shooter with racing! The shooting elements are fast, furious and intense. Although you are up against the same old enemy types time and time again, bar a few interesting boss types. The RPG side is very "lite", consisting of weapon upgrades, vehicle upgrades, a few side missions and in game games. The racing becomes an essential part, as your means of transports for mission to mission and town to town is vehicular. The races provide upgrades to this vehicle, essential for getting to the mission in one piece.
Overall this is a great addition to the ID legacy, it may not change the way we play games as some of their previous titles have, but it's a damn good addition to the genre. What genre that is? I'm not quite sure.