Passed 70-290 today with an 832.  I've been lurking for a while now and thought I should post to let you guys know what a help you were.
Had 44 questions, 5 were simulations.  Sims are no big deal and I think I would rather have an entire test of simulations instead of questions.  I used CBT Nuggets, MS Press Book and TechNotes on this site.
About the MS Press Book - Don't put too much faith in the practice test software that comes with the book.  I took the practice test in certification mode several times, including the day before the test.  I was averaging a score of 60%.
Also after studying the MS Press book I have decided that if I am ever offered a job as the server administrator for any company's antarctic research lab I should turn it down. 

Onto the beast.