The ability that you can easily change your diagram appearance by changing colors or fonts is amazing! I have used many other software but none has such an extensive option as this one does so far which allows me make my own customizations according what i need in terms color scheme etc..
There are some minor bugs here n there like when using shapes sometimes they dont appear even if their size remains unchanged until restarting browser completely (windows OS). In general its great tool especially since we work more than 8 hours every day doing our job without interruption from any device thus having access only at office time would be really bad considering how much important data each project needs daily basis!! It helps us visualize things very well compared others alternatives out therms price range also availability options available within budget constraint too.