The best thing about it was that I could create my own map with different shapefiles of countries which were not available online or even from other software like QGIS etc., so this made me feel more comfortable working as compared to others who only provide ready-to use shapes files (which are also good but definitely less).
It took some time before all features worked properly including zoom functionality; however once they did work then everything else just fell into place! Nothing specific at moment although there might be something if you keep looking around - otherwise its great tool for creating your customised country/world maps. We used polymap mainly because we wanted our users to have an option where their data can easily fit onto one page without having multiple pages filled up by useless information such as headers. This way people will know what exactly each section stands for rather than scrolling through several screens when trying to find out certain things related to them.