Arch never broke for me.
Unless you seek trouble and do stuff without knowing what you are doing (like blindly copy pasting commands from internet into your terminal), it generally just works.
It's not as good as those distros where all packages come preconfigured for you to work nicely together, so if you want to build a custom system (like, choose your DE/WM/panels/widgets etc), you have to configure all of that to intergate nicely. But you could always just install KDE and everything is pretty stable there, same as in any other KDE based distro.