Passed 70-647 with 880 today!
Mainly studied by labbing a LOT. Luckily I'm able to do a lot of that during work-time which really helps. Apart from that I've used the MSPress books which I though were pretty decent.
I took the 70-643 two weeks ago, so these topics were still fresh in mind.. Only topics I struggle with now and then are Federation Services and Certificate Services. Those both had some questions that I probably failed, but apart from those I didn't think it was too hard.
Now where to go next..