I've used Aurelius for a couple years now, and it delivers on all its promises. At my last job, we were in the situation that Zack described of having a bunch of different tools being used to create a bunch of fragmented bits of research documentation all over the place, which made synthesis really painful. After going through the whole process of evaluating all the tools out there that claimed to be great for user research, Aurelius was the only one that didn't feel like a bolt-on to some other product that was originally designed to do something else. The fact that it was designed by a UX researcher for UX researchers is clear in every feature.
I recently switched to a new company, and I lobbied hard to start using it with the new team, because I know firsthand how quickly it allowed my last team to find previously overlooked insights. And how easy it made it to present those insights to leadership as part of a clear story with clear recommendations. Again, it's clear that this tool is built by a UX researcher, because the workflow of getting from a sea of raw data to actionable, supported recommendations feels so logical. I really can't recommend it highly enough.