I finally found a few minutes to run this, and it's fairly nice, but a lot of the remediations mentioned don't have a lot of detail.
Still, a nice addition to the stable.
A similar tool that doesn't require registration and is just a PowerShell module is Testimo - it pulls in a number of other modules by the same guy (Przemyslaw Klys - https://evotec.xyz/
), including gpozaurr and a few others that seem very useful.
There's a fair amount of overlap between Purple Knight and Testimo, but what I like about Testimo are the URLs embedded in the PSD/PSM files as documentation to point out remediations or risks - they aren't exhaustive, but there's a lot in thee to chew on
Purple Knight tests your internal CA if you have one, and Testimo doesn't. Testimo seems to have better coverage of GPOs
Both are absolutely worth a bit of your time.