The writing is far from a pleasure. It's plain and dull, filled with useless descriptions that are placed in all the wrong spots. These descriptions only serve to slow down the already sluggish narration.
The characters are truly obnoxious. I couldn't care less about the fate of Irina or Arkady. Irina seemed like a constantly moaning baby, while Arkady was an arrogant, unwise, and almost too-good-to-be-true version of Robb Stark. I basically laughed at the whole pointless story between him and his wife. Also, if you're writing about the USSR, you should at least attempt to create the claustrophobic atmosphere that was typical of the Eastern area. "We all speak ill about the Party, but you don't have to say it out loud." I'm sorry, but what? You don't even need a history book to know that the KGB killed people for far less than that!
And then there's the thriller aspect itself. I'm not the biggest fan of this genre. I read this book only because I'm in love with the history of Russia and a friend told me it was full of it. So, I don't have the "eye" of a thriller-lover who can figure out the murder after just two pages. And yet, the destiny of almost all the characters was already clear to me before the first half of the book was over. The only thing that gave me any emotion was the death of Pasha, which I thought was very poorly resolved. The rest just bored me to tears.
I don't know. Maybe I'm the problem. As I said, thrillers aren't really my thing. But, like someone else wrote before me, I feel like all the praise this book received was simply because it's a book about Russia, allowing us to catch a glimpse of the totalitarian world of the USSR. Maybe I was expecting too much. Maybe "1984" forever raised my expectations too high for books that reference Communism. Or maybe I just didn't get it. But I really would not recommend this novel to anyone, ever.