I read the three books in the trilogy. My thoughts in brief:

• Three-Body Problem: Quite good. It starts with a chapter called "The Madness Years", showing how horrible the Cultural Revolution and the Red Guard were (condemning both their anti-science and anti-religion worldviews); I was surprised that China allowed it to be published as-is. Has neat science and sci-fi concepts, and explores them fairly well.
• The Dark Forest: Fairly good...if you ignore a major plot point from the first book that could have settled the entire conflict from the second book if the bad guys had used it properly. Most of the story revolves around the question: "How do you beat an enemy that can surveil absolutely everything, except reading your thoughts?" Some sci-fi, but most of it is a paranoia, mind-game type story. Has a cameo by Osama Bin Laden, of all people.
• Death's End: Unfortunately, lousy. There's an endless war going on throughout the universe, altering the very laws of physics, and there's no hope of peace. Earth is destroyed (thanks in large part to the protagonist) and the universe itself isn't far behind. Just pointlessly bleak.

I'd recommend the first two books in the series, but not the third.