The most useful feature of this tool for me has been that it allows to access my entire portfolio with just one click! It's very user friendly and easy-to-use interface makes its use even more intuitive than other software I've used in the past (such as Xcelsius). There are also some features like "portfolio view" or "project overview", which allow you to see all your projects at once without having to open each individual file separately. Sometimes there can be problems when trying to save changes during an edit session - sometimes they don't seem to apply until after restarting the program. This happens mostly when working with large files (>2 GB) but not always; so far haven't found any way around it unfortunately. In general though, everything seems pretty straightforward, no special training required. If you're looking for something simple yet powerful enought to manage multiple portfolios / clients simultaneously then definitely give.