Completely trashed my development environment.
I've tried CodeRush and Resharper, but did not like the way they interfered with the editing experience. I had hoped that your JustCode solution did a better job, but alas, my experience was much worse.
First and foremost, it completely killed Intellisense. I read the trials and challenges face by others, and my experience was not much different. However, I was unable to get Intellisense to work at all after installing JustCode. Disabling the add-in did nothing. My settings were all correct, but I found myself wasting a significant amount of time just trying to figure out what was wrong.
Finally, I just decided to uninstall the whole package.
Interesting side note - when I uninstalled the product, my browser opened a "feedback" page. But when I tried to submit the above feedback, it failed to submit, saying "Oops. Cheer up and download a trial version." Cheesy, guys.