The ability to create complex, large-scale model of real world systems with very little effort or programming knowledge has been one my favorite features since I started using it about 2 years ago. It's also quite easy (and fun) when you get used to its interface which can be difficult at first but gets easier as time goes by. There are some minor bugs that could make things more user friendly like making buttons bigger etc., however these issues don't really affect how much work we do in this program so not too big an issue overall though! We use Ecoligo extensively within our team both internally & externally where there isn’t enough resources available otherwise such as modelling energy consumption patterns across buildings over multiple months/years to see if certain areas need additional lighting / heating etc..