There are many facets to these programs that prospective enterprise storage buyers should seek to understand. There is a significant difference not only in the actual value that different vendor programs drive for end users but in various vendors' ability to clearly articulate that value. No single vendor offers the best value across every metric, but this document will familiarize the reader with what the available features are based on a cross-vendor analysis. It will explain the actual value propositions associated with each facet of these programs so that IT management understands their worth and can use that knowledge to help make more informed storage solution choices.