I have tried several other stat services including Google's. I think AddFreeStats is the very best service available and the most practical.
Some other services have loads of bells and whistles which, in the end, are really of no practical use at all. If anything they are a tiresome distraction.
AddFreeStats helps me interpret raw website visitor information, assists in alerting to problems my customers may be experiencing on particular pages, what products are drawing the most interest and keeps me up to date for instance on what operating systems my customers use, etc. I love the simplicity of AddFreeStats. I highly recommend it to any serious small business owner.