I like that it's easy to use, even for those who have no prior experience of computer programming. It has helped me create many different graphics (schematic design) within minutes compared with other programs which take hours or days more than it takes using this one. Since all our documents are saved as PDF files we can't open them externally without some third party apps but if you save your work at least once before opening any external file then there should be nothing wrong doing so - just make sure not lose anything! There isn't really much else i dislike about working with codesys webvisus because everything works fine until now! Maybe try out their tutorials first since they're free and i don't know how good would these be otherwise especially when learning something new and complex such like CAD drafting programing etc., well definitely worth checking out! We've been able to produce drawings faster by saving every time.