My abiding memory of it that it handled the basics very well but lacked advanced features. That was a long time ago though so it may have changed.
KDE
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org, check whether it has been reported.
If it hasn't, report it yourself.
PLEASE THINK CAREFULLY BEFORE POSTING HERE.
Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.
Cool, and this is a good thing. I like it.
That said, after loading KDE on a system this weekend I was reminded of how much like Windows KDE is (on purpose, of course) and how I don't like it.
It's brilliant for someone moving to linux from Windows who "likes Windows" and it's beautiful and fast and free. Just not my preference.