Not sure.

Originally I liked it.
Then, it just stopped working so well.
Our Google Analytics would show 100+ visits, and awstats in the same range, while this plugin showed in the range of 5 – 10.
Don’t know why.
Before we were going to uninstall, we did the remove plugin and data routine. After the first time, there were still files in the plugin’s directory, so we did it a second time. Immediately, our site went to white-out. By removing the plugin’s directory manually we were able to get the site to come back up.
My personal opinion is that it needs work. I wish it continued to work. When it did work, it seemed to work well.