The best feature I liked was its data mining functionalities which helps in creating automated process for any kind of application. There were some minor issues like sometimes it slows down when we are working on more than one window at same time or if there is too much traffic in our network then this tool will slow down. And also the UI of this software needs an improvement as well because sometimes user faces difficulty while using this tool. This is very good product from Microsoft. We have used it for developing automation processes in our organization. It has helped us a lot by providing different options like code generation etc.