I was able to use RivalFlow on our blog while it was in testing. I have always updated our content. Before, it was frustrating that all the work I poured into the update never really did much on the SERP. I have been desperate for actual feedback about what to add to my pages to get them to rank.
This gave me the exact analysis with excerpts to drop onto a page, and they fit pretty well with what we had written. I adjusted a few lines from time to time, letting the tool give me ideas, but I get to stay in control of what we show on our pages. We saw results fast. Really fast, like within days.