Any youtubers out there tried tube buddy?

https://www.tubebuddy.com/

I've seen this recommended a few times.  Not sure what it does or how it works.  But the creators that talk about it seem to love it.  

Anyone out there tried it?  

It's a collection of tools that suggest changes to your video's information (based off the data of everyone using TubeBuddy) or allows you to edit things in bulk. There's a few different tiers but everything that seems to be useful is in their paid tiers.

One thing to note is that it is against YouTube's Terms of Service to use this - I am not sure if anyone has gotten banned for using it, but it was not a risk that I felt comfortable taking.