CS5.5 Premium Edition - Mavericks or Yosemite?

Question

Re: Creative Suite CS5.5 Design Premium (Students and Teachers Edition).
So after waiting for a while before considering to update to Yosemite and reading many forum posts here and other forums on the web saying how easy it was to update with no problems and everything works as it should be, just update the Java etc, along with the heart ache and posts saying don’t upgrade, programmes not working, CS5.5 is now longer supported and people saying that they are reverting back to Mavericks and advice saying look on Roaring Apps to see compatibility issues, which to be honest is inconclusive at the moment.
Among those people who are still using the CS5.5 Premium Edition Creative Suite and individual programmes, what is the general opinion, is it now safe to upgrade to Yosemite or is it better to stay with Mavericks?
I could do with adding a Poll here to get some kind of insight on what forum members recommend.
Look forward to your replies.

Answer 1

This is addressed to anyone who wants to help.  (Hi Bob, you seem to be on this forum a lot.)
Here's my sad story:
I bought the Creative Suite 5 Design Premium Teacher/Student version last year from a guy with a good sales reputation stats on EBay.  He wrote that he's a trainer for the Navy and when he tried to register it, found out that his service to his country as a teacher-trainer didn't qualify him for the discounted version. 
I bought it and when I started back in school last week, I got a message from Identit-e that it was already registered. 
Trying to give the seller the benefit of the doubt, I wrote Identit-e back and asked if the registration was successful or whether it was aborted because the guy found out he's not eligible. 
They wrote me back and said that his registration was rejected because he was ineligible.  AND, that the software has been registered and I can't register it.  --Say what?!
I called them on their logic and they wrote back they won't respond anymore.  Case closed. 
So, being as Adobe told me the other night I'd have to take the issue up with Identit-e, and Identit-e has responded how it has -- I seem to be screwed here.  I don't have money to blow like this -- I'm unemployed and trying to retrain myself and get employed again by going back to community college. 
I'd like to keep a high opinion of Adobe and that it does have some caring customer service in addition to great products. 
WHY would they associate themselves with such a shameful, loser verification company??
Can anyone out there help me?!  ADOBE?!?
Thank you.
Veronica