Geralt of Rivia, the titular Witcher, starts off pathetically weak and unable to properly defend himself, an issue that's not helped by the broken targeting system, unresponsive controls, and the aggressive enemies that surround our hero and attack from all angles -- you can't even parry multiple enemies without unlocking it on the character skill chart, and even then it doesn't always work.
As far as European roleplaying titles go, this is absolutely the best example one could hope to find. The combat feels fast and fluid once Geralt is strong enough and, depending on your choices, the second of the game's three chapters can be an incredible experience with a thrilling conclusion. Witcher 2 can be experienced multiple times with different stories, due to decisions that affect how the entire game plays out, and the adult nature of the narrative -- which doesn't skimp on the brutality, swearing, and sex -- might not exactly be mature, but can at least amuse in spite of the overall plot's dull nature.
The Witcher 2: Assassins of Kings is a solid enough experience that gets better the deeper into it you get. It starts off as a deeply unsatisfying game which wants to punish players who try to enjoy it, then becomes rather endearing, with the acquisition of power and loot at least providing a traditional sense of accomplishment. When all's said and done, however, the game's high points arrive too late and provide too little. While hardcore fans will likely dive into the game and have fun, those who don't feel that they should be made for pay for a game with their patience will be put off.