I bought the Protectli, because I love the interface combination. Added 8GB RAM, 64GB SSD. Goal was to run Proxmox or VMWare ESXi on it with one VM so that I can make snapshots before I do experiments with the guest. A dual core celeron CPU should be enough, I thought. But Proxmox was instable. On ESXi it wasn't possible to upload 2GB files. Neither via web nor SSH. It just hung after 5%. So I couldn't even try a VM there. Then I installed Ubuntu directly on the Protectli, installed VirtualBox and tried to run one VM. The speed of the Ubuntu was not impressive but okay. But the VM was just ridiculously slow. I'm not talking about CPU intense applications. So I ended up returning the box. The Protectli might be okay for the purpose it was designed for though.