Google Analytics so far in my experience (besides it telling me that I didn't put the code in my page) is pretty sweet. I haven't checked out all of the features and I don't really plan to since I'm mainly just using it as a hit counting service (which isn't really its main purpose). I don't need all of those bells and whistles, but they're still cool. I have been using Site Meter, and it's got a lot of the same services (world map, referring sites, daily hits/views, etc.) but Google just does it much better.