I plan on picking it up some time soon, but I'm not sure when. I've heard nothing but bad things about the book. Well, I mean, I've heard some good things, but I've heard more bad things than good things. The most telling bad thing I've heard is that it reads way more like a work of fan fiction than anything else, and that there are lots of things that happen that fly in the face of established canon. We'll see. Like I said, I plan on picking it up eventually, if for no other reason than to add it to my collection.
Haven't read it, but I'd just like to note that I'm not particularly thrilled about Spoiler the whole Voldemort having a child thing. With Bellatrix Lestrange. It's silly. It seems uncharacteristic of Tom Riddle. And it does leave the impression of fan fiction. That being said, my opinion may as well change once I've read it (I'll get my hands on it eventually).