We used that for quite a few years, were able to get 40-50 VMs on a Dual-Xeon box with 6GB of memory with no trouble. It's very lightweight and flexible with me

We used that for quite a few years, were able to get 40-50 VMs on a Dual-Xeon box with 6GB of memory with no trouble. It's very lightweight and flexible with memory compared to systems like KVM and VirtualBox