I love how you can easily create your own shapes by using geometrical figures to draw them out or use existing ones from other programs like Microsoft Excel/Powerpoint etc., it's also very useful when creating graphs with multiple variables! You cannot save files as they are saved locally so if there was any mistake made while drawing something then you have no choice but delete everything again which gets tedious sometimes.
Also some features could be improved such as adding more options to customize things further, i would recommend this program because it does what its supposed too do. It helps me design my math homework much easier than doing it manually through paper & pencils. This saves time since it takes less effort compared to writing equations down myself.