The document discusses the author's experience using FME for data transformations. It describes how he initially used FME for simple micro-transformations between file formats like AutoCAD and shapefile. Over time, he learned to build more complex and dynamic macro-workspaces that could batch process large amounts of data from many different sources using generic readers and writers. The author emphasizes best practices for workspace design like bookmarks and naming conventions to manage large and repeatable transformations.