Your best bet, if you're looking for site stats, are the ones provided by your host. Many hosts have more than decent stats. One of mine tells me what page they came in on, what page they left on, and how long they stayed (if it can guess based on the previos data) on each page. Reports on most used pages, how many times served in a given timeframe, and more.
As always nothing is 100%, but they're pretty decent for accuracy. The server itself logs IPs, sessions, and such.