The most valuable feature by far has been the virtualization capabilities of the operating system. I can run multiple guests on "small footprint" hosts using the latest in Intel & AMD technologies, and take advantage of newer storage technologies, such as NVMe, to build lightning-fast hosts the size of a toaster.

I've also been able to provide rock-solid backup solutions such as URBackup, for example, compiled from source, that sits on stable platforms. They simply run until I restart them. 

I use openSUSE Leap as the base for the Kubernetes cluster we run in-house.

The solution is very stable after it is configured. It is hard to have a panel slow, a problem, misconfiguration, or any kind of loss function.

The solution is easy for me to use because the backend is derived from FreeBSD and this is something I have been using for over 20 years. 

openSUSE Leap is easy to use. It is not hard to use. It's actually quite easy. It's easier than Oracle, Linux, and other tools. And it's easy for managing servers. 

The features that I have found most valuable are:

• Stable - it just runs without the necessity to reboot.
• Reasonable support for an open source product without a paid license.
• The Zypper update tool