I'm curious as to why you would say this? What is the down side to virtuozzo? In the past when I ran my server I owned and ran my own linux server and had no administrative software on it. I did things the old fashion way. So I'm trying to learn what the advantages and disadvantages to administrative software are.

What alternative choices do I have for a VPS? There still has to be a way to stop, start, or reboot the container.

VMWARE esxi is champion. Virtuozzo isn't terrible, but it can't compete in my opinion.

Yeah for sure use Xen or KVM...

Virtuozzo/OpenVZ VPSes depend on the packages/software installed on the host box as well as the VPS. So changes made to host box packages/software can affect the VPSes packages/software. Xen, KVM and other platforms do not. Do not get me wrong OpenVZ and Virtuozzo can be great if the administrator can do what you need on the host box.