OpenVZ

Efficient and Performance-oriented: Users have consistently praised OpenVZ for its high efficiency and performance, with several reviewers highlighting that it has less overhead compared to other hypervisors like KVM or VMware. This sentiment is shared by a significant number of users, making OpenVZ a standout choice in terms of maturity, performance, and feature set.

Easy Management of Containers: Many users appreciate the easy management of containers provided by OpenVZ. They find it highly advantageous that they can access physical hardware devices such as PCI devices, network cards, USBs, and disk drives from inside the node. This feature has been widely appreciated by users.

Simple Installation and Management: The ease of installation and management is a common sentiment among users when it comes to OpenVZ. Reviewers find it easy to install, set up, and deploy virtual machines - VMs. Additionally, they mention that taking backups using OpenVZ is a straightforward process.