I TUPE'd over to RM earlier this year. CC4 isnt too difficult really, just strange ways to do some simple things and easy ways to do some complex things. They sent me on a training course for it (3 days) it was geared more for people who had used CC3 but i picked it up easy enough and was the first person to finish the exam at the end (and pass lol). The course was mainly a quick discussion of the topic then straight into a lab to practice / mess with advanced features. I would recommend it if your going to be using it day in day out. The manuals are good if can stomach that amount of reading and technical info. I still use the CC4 manual i got there every now and then.
EDIT we use 2008 R2 and Win 7 and there have been no real problems so far
