I read them. I really enjoyed the first one and raced through it. (I hate violent/horror/gore but these got so many great reviews that I decided to give them a shot). The second book was good enough- could have been better I felt, and the third one was a big disappointment.
The main character never seemed to grow/develop and by the end of the third one all the characters had been butchered imo (not to put you off or anything!). Its such a shame because I felt the author had set up such an intriguing storyline that really could have been great. But the third book in particular felt like the author had either run out of ideas, or it was rushed by publishers.
Still, many people love all three so its def worth seeing them through to the end.