Although I did have a few quibbles (I stumbled over some seriously over-detailed scenes in the beginning, one of the crime scenes unfortunately bears too much similarity to a recent horrific tragedy, and I found the ending the slightest bit convoluted) I am still a devoted fan of this book. 
 Two things sold me right away- the intriguing premise (regarding the villain) and the wonderfully drawn main character (I didn't expect to like Dagny as much as I did). Miller had his hooks in me from the first, and never really let go.