I sat 70-291 today and passed with a 921, it wasn't the beast I was expecting, in fact I would say it was more akin to a labrador or a teddy bear!!
However, because of the reputation this exam had I think that I allowed more study time and paid closer attention to covering all of the exam objectives, hence it proves (for me) that this exam isn't any harder than other MS exams with the appropriate preparation.
The exam froze twice about halfway through and the Prometric centre staff moved me onto another machine, which cured the problem, but it was nerve-racking for a bit while they sorted it out! And there was a guy in the corner who kept coughing and ruining my concentration.
The 47 questions were predominantly made up of DHCP and DNS, with a sprinkling of RRAS, IPSec and WSUS at the end, there was one SIM (which really was laughably SIM-ple) on DNS.
When the exam finished I didn't experience the usual jubilation, it was more a sense of relief to be honest, and now I shall have some time off for lager, sleep and chinese takeaway before starting 293 in a couple of weeks time.
Oh yeah, I used MS-Press, CBT Nuggets and Transcenders for this exam (it seemed to be a winning formula going by this forum), and I also read Syngress for the first time, which I thought were excellent, although they did seem to go over the top with detail, although this is no bad thing.
Cheers!