Honestly, I don't think Her Knights is all that great. I just finished it a few days ago.
The AI is terrible. You can stand right in front of enemies and they won't move. Hit them a few times and you still get no reaction. While getting pissed off at some of the later levels, I found out that, on any levels that lack a boss, you can just dash all the way to the end of the level. While this can be considered cheating, it kind of sucks that it wasn't fixed. Most beat-em-ups only allow you to go so far without defeating certain enemies.
Aesthetically, it looks and sounds great. It has a ton of moves for all the characters, which is nice, but beating on the dull enemies isn't that engaging. I think this kind of stuff could be fixed with a patch.
Mind you, I'm not knocking Byulbram. For being pretty much a one-person team, he produces some nice stuff, and I'm looking forward to Blood Cross. I just don't think Her Knights is the "omg awesome it's so great wowow" game some make it out to be.