Phase Data Or Phase Engine

Has anybody here had experiences with Phase.com [[url] as a provider or the "Phase Engine" as a hosting environment?

Background: We are a marketing firm, and we've been engaged to work on a website for a medium-sized not-for-profit, and I've just learned that their hosting environment is something called the "Phase Engine" [url]. It's not real easy to figure out what it is, exactly, but it seems to be some kind of comprehensive CMS system. We've pitched to them the idea of putting them on a CMS because it appeared to us they weren't, already; it now seems that they are.