To be honest I've barely managed to do anything with it so far. The first half hour I spent with it was spent trying to figure out what the hell was wrong with my touchpad, which was no longer functionally scrolling. I ended up having to uninstall then reinstall the most recent driver update.
So far I've run into nothing but frustrations. It took me a long time to get the search box off the taskbar, and I'm annoyed that the accent color no longer changes to keep up with my current background. (I spent a long time making a set of custom backgrounds that rotate every 10 minutes, and I really liked that even when I had windows open, I saw accents all over my screen shift in tone every once in a while.)
I don't know whether I'm going to find anything to like about Windows 10. I'm not really excited about having the start menu back, so there's the one thing people seem to care about, gone. The notifications thing looks potentially pretty cool, but I don't have time to customize it tonight.