The best thing about this product is that it runs in virtual machines, thus you don't need to worry if your physical server will be compromised with malware or viruses etc..
It's very easy for beginners as well so they can easily manage their servers without any issues at all! I dislike nothing but maybe some of its features are not available yet (like multi-node clusters). If there was one feature which i wish would have been added sooner then Multi Node Clusters could work better than now!! We use K8s mainly because we wanted something secure where our applications run properly while providing us maximum security from threats such like hacking attacks/malware infectionsetc.,.