All my other games will have to wait!
Graphically it looks the same as Clear Sky with some improved effects and texturing. It's no Crysis here, but it's not horrible and besides it's not what one should be focussing on. For me the size of the maps, open ended feel, the side quests along with the main quest and the eerily creepy sound effects that creates the atmosphere in the game makes it feel like something you've play before but missed a hell of a lot.
The game is definitely polished in all areas and does the one thing a game in any genre should do ... and that is the grin factor. How much does it make you want to play again and again.
Definitely the best in the series for me. Should yo play it?
Oh it's a definate YES.