As Daz said, it is sort of like improved chat, used for binding keys, but it has improved binding.
-GUI interface to see what keys already have something bound, and what is bound to them
-Much easier than imp chat obviously since you have a GUI and you can actually tell what is on your keys
-You can use the number pad with this, which you could not with imp chat. You can also use home, end, page down, and so on. You can even bind middle mouse click and the F1-12 keys.
- It has its own version of notepad inside MC to make notes and write up complex recruiting macros without going out of MC, come on now.
So yea, there is the key features that I like about it. Although I highly doubt I would ever use any other part of it besides the number pad bindings, which are working awesome so far on the CC planning server. I no longer hit letters by accident and start spamming stuff because everything is only bound to my number pad. You can move while using bound keys as well, which you cannot do in imp chat because it tries to type both keys then and messes up.
Also I see no unfair advantage anywhere that is any more than the approved Rei's minimap or imp chat. I can still bind things but better, and can move with them bound. It's all about actually getting the mods, really. If someone does not have reis they are at a disadvantage because they cannot create way points, death points, know what direction they are going easily, or see their coordinates without bringing up the F3 menu which covers a large portion of the screen sometimes. Because I can bind anything this would make Herocraft even more like an MMORPG and give more immersion of me into the world of HC.
So really, someone come and officially approve this mod already D=.