A neat story filled with plenty of violence and disturbing visuals (in particular, building a bear trap from the spine and ribs of your beheaded corpse... yikes). It's also a cool little twist that the crash actually caused, not the cloning machine, but the AI to malfunction. And finally, an interesting cliffhanger ending where John is accidentally revived and vows to take his revenge (it'll be cool to see if this is continued, but I think it also works as an open ending).
One thing I am a little confused about is the "defective clone". I could have just missed it, but is it every actually explained what it was, or why the AI needed John to kill it? Was it just like, an invading alien or something? Aside from this minor confusion, I still enjoyed the story a lot! Great book!