From what I'd heard about it and read on the page it looked like it'd just be a toonier version of Vindictus, but it feels closer to Dungeon Fighter Online with less mashing (and therefore less hand stress) required to get combos. Reasonably challenging solo, no idea what it's like in a party as I haven't bothered joining anyone yet (soloing master difficulty for SSS-rank rewards, awww yeah), with pretty low hardware requirements from what I can tell and what feels like a very friendly skill cap: anything below hard difficulty feels like a cakewalk for me, so I would imagine someone new to action RPGs should get by just fine on easy/normal, though that does of course mean missing out on various quests and rewards.
Also has probably the least invasive cash shop of all the Nexon games I've tried so far, which is nice; their promos have a way of getting obnoxious very quickly in some of their other games.
Brought an archer from 1-14 in a day, more or less. Trying a warrior now as I have to admit I get a little frustrated by the ranged aiming hit detection at times, despite my otherwise liking the archer quite a bit. Melee just feels like it works better, except when you clip through things so you can't hit them 'cause you're walking out the other side. xD