Been using Google analytics almost right after Google bought out Urchin. All I care about is macro data such as page views, visits, unique visits and the sort. The granular data Google gives is mostly meaningless (difficult to use as well) and I can get what I need from my resident Awstats analytics.
For clarity I have almost a million monthly visits and a relatively large and well established website. My revenue and traffic model does not rely on a narrow set of page views or subjects.
So, why should I carry the Google Analytics load?