What is the limitation of using fox metrics ?

First time I hear of it. I use the FREE Google Analytics like most of the world.

I agree, Google Analytics is far and away the best and easiest to use and give powerful analytics reporting - I really like their new UI. Having taken a quick peak at Fox Metrics, I'm not clear what they mean by "event-driven" analytics. If they had a more compelling case for what they offer, then I might be interested, but wasn't grabbed in the 1 minute of browsing their site.