It's ok. Not really my cup of tea as I find it a bit repetitive. Kill group of monsters, move along and do it all over again. I suppose most games are like that. Don't really understand or care about the story myself.
It's cool for awhile chopping off heads, arms, legs, torsos, etc. But, I'm starting to tire of it. I'll probably move on to Lego Indy tonight.
On the 4th Chapter now...so you can't say I haven't given it a fair chance. Fans of the first one will like this. People that are proud to say they beat the first one on Master Ninja (or whatever setting) will probably get the same rush saying it about this one, too.