The tool has helped us monitor our website's traffic flow better than ever before! It provides all kinds of useful metrics regarding how many users use what pages etc., which helps me understand my audience more effectively (which in turn gives you an edge over your competitors).
I don't think there are any downsides as such; however we would like it if some other functions could be improved or added into future versions - ecommerce analytics/e-business intelligence being one example amongβ¦