Just couple hours into the game, it is very similar to the game Ninty Nine Nights so please allow me to make a direct comparison.
Pros:
Asian Lanuage support (not a pro for a lot of you but its just for me)
Up to 4 players max online co-op play (Think of it as N.N.N play with 3 of your friends) There are online match lobby but I only played for 30min online so I will not comment more untill more time spent online.
Equipments added into the game, which you can combine and sell trade with other players.
Cons:
Somewhat smaller scale battle compare to N.N.N I think a lot of it has been cut because it needs to support multi-play
Narrow space compare to N.N.N
Story not very good, I think shallow is the best word to describe it
Graphic wise is not superior comparing both games. N.N.N color is more richer and KUF is brighter. I put it into cons simply because its a newer game and better graphics is expected.
Combo animations are very similar to N.N.N if not even more simple.
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I realized that the negative aspect does seems overweight then positive, but if you are a sucker for multi-player and mindless hack-and-slash fun then I strongly recommend. Its a good relax piece to have and play on and off with your Mass Effect game, because saving galaxy from the Reapers is hard work! 
(Excuse my not so funny joke)
