I finished Metal Gear Rising recently. Easily in top 10 best games I ever played. Had a great deal of fun with this title, definitely recommending it to everyone. 
Since I was literally memed into playing it through youtube videos (probably wouldnt have played it otherwise) I was afraid a lot of the stuff has been spoiled for me, but the game still managed to surprise me with content. 
Wasn't too hard, once I learned how to parry I haven't had real problems until the final boss really, although the game will shame you by giving you a low rank if you do a level poorly. 
It's quite short. The story mode took me like 6 or 8 hours in total I think. But it's non stop action (or cool cutscenes). And I don't feel like im finished with it either. Definitely going to play it again on higher difficulty later. Also finishing it unlocked some extra content where I can play as other characters from the game.