Passed with 850 yesterday - first go.
Its a nasty exam, I had about the first 10 questions just on permissions ( my weak point), and wasnt sure I'd passed until the exit button.
I got about 6 sims - they were straight forward if you have experience with win2k3, quite enjoyed them, just basic enable this, delete this account, move this account, and some disk management items like converting a drive to dynamic and set up a group scope.
I've done loads of exams in the past 8 years, but this one I found very testing, I mean the knowledge required was alot deeper than I expected, and certainly alot deeper than Transcender .
So save yourself some money and prepare..I really recommend setting up test labs with vmware, and getting to know the tabs and menus really well, eg Terminal server rdp-tcp configuration , & shadow copies - can they be relocated . Install a SUS, and web site. I got at least 3 questions on backups.
Oh yeah , the exam itself was a bit buggy.. some questions took about a minute to load up, and I was left looking at a white screen with just the calculator button and thinking the thing had hung. Use the time to breathe deeply and refocus