Its the sophisticated paid version of their Google analytics, and one of the main benefits I can see is that you host it yourself, so not reliant on Googe code (think recent google outage)
.It looks like it analyzes and compares you server logs as well as just javascript based browsers, as well a whole load of other functionality.
Just at the curious stage rather than a serious buying stage, as I can't see the justification for the $10k price tag on Urchin7, or $3k for Urchin 6, but with a price tag like that, it must prove a lot more useful to earn its keep.
There's a few out of date blog posts floating round shouting the differences, but wondering if anyone here is using Urchin, or are you still overwhelmed with the amount of data available with Google Analytics?
