Don't get me wrong -- HYBRID 2 is actually a lot of fun. If you've played the first one, you'll automatically know what to do, and even if not, you can skip right past the cutscenes and get right into the excellently stylish 2D fighting and rewarding level grinding. Once you actually wrap your head around it (and your fingers around the less than trustworthy D-pad and virtual buttons), there's some great hacking-and-slashing action to be had, with hundred-hit combos earning XP and loot all the way through the quest-based storyline.
The game is worth the US$4.99 for the right person. If the action sounds good to you and you aren't about to let a cluttered interface and clumsy story get in the way, have at it. Everyone else will probably have to wait for Dungeon Hunter 2 to get their action RPG on.