Here is a review article by Storage Switzerland that outlines the benefits of using Dell Rapid Recovery (formerly Dell AppAssure) and features available in its latest release:
Dell Rapid Recovery now offers agentless backup for VMware as well as its tried and tested agent-based backup.
In addition to being able to run recovery versions of a VM from the Rapid Recovery server, customers of Dell Rapid Recovery are able to run a recovery version of a VM in the Stortrust cloud. This is regardless of whether the backed up system was a VMware VM, HyperV VM or a physical machine when it was backed up. This makes it the ideal platform for business continuity.