The most valuable feature is definitely the fact that you can use a single platform to deploy to different resource providers. Right now, the version I'm using has vSphere and AWS, but I know in the future they're planning on adding more. The ability to deploy clusters on-prem or to any number of public cloud providers is really valuable because you don't need to relearn or switch platforms to switch resource providers.
One thing that is a little bit annoying about Cisco Container Platform is that for each cluster you create you have to go through the same web form each time. If you're creating two identical clusters, you still have to go through that web form twice.