So finally upgraded my 2008 certs to 2012 only taken about three years to sit the exam, I had been meaning to do this for ages but the time and effort for these update exams is a killer.  Luckily I have had some quiet time at work recently and so decided to take advantage and update my certs, kind of got the taste for it again after a couple of years off lol..... work, life etc getting in the way.
I scraped this exam having purchased the multi shot bundle I took the exam earlier than I would have done as I wasn't sure that I was ready, anyway talk about skin of teeth: -
1st Section score - 700 on the button 

 I got 800+ in the 2nd and 3rd sections
Anyway just some info hopefully not breaking NDA but someone might find it useful.
Study Materials: -
CBT Nuggets 2012R2
Microsoft press book 70-417R2 version (purchased the original version never read it so had to get the R2 version Arghhh)
VMware labs
About (50 - 75 hours study time I would guess)
The upgrade exam is almost exclusively on new techs (No surprise I guess if you have sat the upgrade exams before) so you need to know things like IPAM, RMS, Hyper-V (new features) well
There was also a fair amount of GPO based questions in my exam around things like security filtering, WMI, link order etc...
If your sitting this exam then I guess you are already certified and would now most of this but may help someone 

So now I'm back in to doing certs sort of... I thought I would finally give the Citrix Exams a go as I spend most of my time deploying and supporting it these days although I am thinking maybe MCSE private cloud as well or who knows maybe a 2016 upgrade exam 

Good luck to all this is a beast of an exam