Honestly, it works. Never had a bit of trouble. I might not be a mega power user, but all my stuff is there and I just don’t think about it. I moved away from Dropbox about 2 years ago – because I got sick of the shitty invasive macOS client software – and I regret nothing.
Bonus: invoking Spotlight on an iPad and having your files just show up is kinda magic.
I switched _sync back because Alfred and other apps warned that using iCloud Drive for sync doesn't work great because it doesn't always update properly, and I've found that to be the case.
I like these third party clients for things that are showing up (E.g. Apollo for Reddit).
I do like how iCloud and Onedrive have become so tightly integrated/transparent. (Benefits and banes).