The GUI for configuring kubernetes compose files makes it easier than writing yaml, and you get an easy way to test changes in your dev environment without having to do any of the work. While working through my own problems I have found this feature very helpful. It would be great if they could create some type of interactive tutorial that walks through all features including using multiple containers within a single pod (which was one problem I ran into). They also give tutorials at their conference but those are not always as thorough or useful. As mentioned above, I used it when working to build out our cluster from scratch - so there were no existing configurations to reference like we had with old fashioned yamls!