I like how easy it is to use, even for those who know nothing about GIS or remote sensing. It's also very user friendly with good tutorials available online. One of my favorite features in this program are the ability to create maps from scratch as well as importing/exporting data files. The interface could be more intuitive and easier to navigate.
In addition, there should probably be some way to make notes directly into your map. This would help keep track of things you need to rememberβ¦