Features and benefits are easy to describe-the Omni Group does a good job of communicating that. Value on the other hand is very subjective. The features that one user might find value in, another user might find totally worthless. What I believe sets the Omni products apart from the rest of the pack is there is no risk in seeing if they offer value to you. Don't find value in OmniGraphSketcher or OmniGraffle for the iPad? Still think that OmniFocus on the iPad is 'meh'? Then ask for a refund in the first 30 days and you've risked nothing. I can't imagine a better way to communicate the value of a product than letting the user decide for his or her self.