The best thing about this tool was that it allowed me create diagrams which were very easy as I could easily draw them using my finger or keyboard (no stylus required).The only problem i faced while working here but not much because there are many other tools available online like dia etc., so no need worry! This software helped us understand our project better than any books/papers we had written before hand;it also saved time during meetings where everyone can share their ideas without writing anything down first!!