I am currently using 15.04 as that was the easiest way of installing the needed nvidia driver.
Also, I get to play with the latest packages 
However, when I try to switch to Compiz, the window decorations disappear. I have tried logging out and back in, and tried to play with the CCSM settings to get them back, but no luck. I have seen from the release notes that this is an issue with older Nvidia cards, but my card is from the newest generation (GTX 960).
Any help would be appreciated 