Just got back from the Test Centre - failed with a 550

The format of the exam was staightforward, just 40 questions to answer in 90 minutes.
Very few questions I could answer immediately and I marked over 20 for review.
There was enough time to finish all the questions and review as needed.
I'm not sure if the PRO series of exams is a different animal to the MCTS exams - any thoughts?
I've got a second shot on this, so I'll reschedule and have another go before the end of the month

I will look at the exam report and review my weak areas - Server Deployment / Server Management - maybe I'm not familiar with the management / planning aspect of this exam type?
I've used MS Press Training Kit, Syngress and some of the 70-640/2 Exam cram notes.
Used Transcenders also.
Would it be worthwhile getting the CBT Nuggets for this exam - anyone used them for this exam (70-646)?
Well its back on the horse and back to the books I reckon

I'd appreciate any feedback from those who have taken this exam, whether passed or failed.