I like that it's easy for me to see what my visitors are doing on any given day, week, month etc., as well as the ability to create custom reports based off of time frames. It can be difficult at times to figure out exactly which users have been viewing certain areas/pages. The system is very powerful but sometimes needs some updating in order to work with newer versions of websites. We use click flow primarily to track our Google Adwords campaigns. Before we could only monitor one campaign at once. Now we can easily keep tabs on all of them! This has allowed us to maximize our efforts while minimizing wasted money.