I've used it for a long while, from windows 8 to last summer on windows 10. Works great.
After a warning that classicshell was discontinued I finally decided last summer to make the switch and use the windows 10 menu; remove the full app list always appearing, remove all the "magic tiles", put small sized tiles for my app grouped by categories and using the stack system (several tiles in one).
Works decently (well enough that I can fit all I want in a single menu view, no need to scroll), and at least it's supported by windows so I don't risk losing it randomly some day.
My major remaining issue is how broken the search is, open start menu, start to type and it searches but I have no idea what kind of broken search algorithm can possibly gives such terrible results, perfect match are sometimes not shown, things that barely match fill the top of the list ... I know alternative exists but I don't see why I would need that here, it's just sad. I disabled all the web search features that made things even worse.
The modern windows 10 start menu can be made usable again, but it really feels like a case of you guys needs to go back to the basics instead of trying to fix the fix of the fix of what doesn't work. Throw it away, start again.