I have tried many of them on my blog, including MixPanel, Google Analytics, Clicky and Lijit. They all have their pros and cons, but they also require you to include a script on your pages, which can be slow at times.
I'm currently fairly happy with Google Analytics, but I'd move to a better server-based log analysis tool (AWStats on steroids, maybe?), if I found one.
I'm currently fairly happy with Google Analytics, but I'd move to a better server-based log analysis tool (AWStats on steroids, maybe?), if I found one.