I have just bought the upgrade, but I'm coming from version 8 so I expect to see some improvements.
It's on a new computer which I haven't switched over to yet, so I'm not using version 11 yet.
I did have a good look at the trial. There's a few things in there that helped me decide to upgrade.
Mainly for me is the newer icc profiling module. I was able to create a good printmode with my i1 spectrophotometer and their software.
But, the trial ended before I could fully test it. They offered the profiling module for half price too, so I bundled that.
Will keep you posted. It'd be good to have someone to discuss things with.