We're using Chef right now, and evaluating other options. They seem to either be between way too over-engineered, or not flexible enough, but nowhere in between. I'd love to see a tool like yours be brought to full maturity, then I think I'd love to use it.
We were coming from Chef where no one knew what was going on. We were looking for something simpler. There wasn't really many other options unfortunately. We're not full-time devops people...hence much of our frustration.