I like that they are constantly trying to improve it by providing new features, such as custom formulas or even data sets for better analysis results! One of my favorite things about this software is how easy you can create reports with multiple filters at once while keeping all your information in one place (PowerBI).
Sometimes there isn't enough space when creating charts/reports due their large size which sometimes means some parts will be cut off making them hard too read through without having zoom out capabilities enabled; also have problems viewing certain Excel files within power BI but other than those few small issues everything has been great so far!!