Overflow cafe has done absolute wonders for our business since November 2011. We clearly saw the progress made, including dramatic improvements in search engine rankings for 134 keywords and 20x increases in our traffic. Our conversion rate increased from 2.5% to 14% after they rebuilt our website. Like other reviews I've seen, I agree with most that say their reports can vary from very basic to comprehensive depending on your website AND depending on what YOU ask for. There's a universal report on your dashboard automatically, and several more advanced and detailed ones by email. They can sometimes be confusing. You can also request incredibly detailed reports if you're a scholar lol. I just prefer the basic reports these days.