It's very easy to use, it can be used with all versions of erlware (from 6x), has many useful features like tracing errors or profiling code execution time in real-time mode as well! I don't have any dislikes about hex; everything works fine but i think that there are some bugs related only when you work directly from command line without using emacs/vim editor so maybe they will fix them soon because sometimes we need this feature more than others! But still its good software if your project needs something specialised such monitoring system etc..