I have had some fun today dowloading some apps from the SDL App Store and installing them into my brand new Studio 2015. How useful they are going to be remains to be seen but they were free so no harm done.
Last summer I spent 10 days working alongside 5 other translators, one of whom taught me a lot about Studio. One of the things I found most useful was the function keys for Find and Replace. I note that these functions are now accessible from the function ribbon at the top of Studio 2015.
I have had a little explore of Studio 2015 and on the whole it all looks familiar so I should be able to hit the ground running.