The graphics are sharp, the game play is tight and its certainly one of the most finished games out of the box I have played in ages.
If you like to snipe (and who does not) then the Hunter class is great fun to play. The weapons are interesting and varied and the levelling up process works well and makes you want to keep playing to beef up your character. I currently have a level 25 Hunter who is absolutely deadly at long range and his pet eagle (blood wing) is awesome at taking out those hard to reach enemies.
I would call it an open world first person shooter with a very basic RPG levelling system bolted on. It is also is great value for money as I have played for over 12 hours now and have just completed chapter one (compare operation flashpoint: dragon rising where you can complete the single player game in 7 hours!!). The respawning is well handled and not overly relentless and the missions are as varied as they can be given that this is a shooting game.
Overall I would recommend this game to anyone who likes FPS shooters and the open world games. Its also great to play a game with no bugs and seemingly no need for any patching on the single player at least (compare Fallout 3 Game of the Year which has bugs and the worst slowdown I have ever experienced on a playstation 3 game).