Good Bloody fun, but not worth US$60, look for US$40 or less.
Difficulty: The camera plays into the difficulty at times in boss fights. Nothing really too problematic difficulty-wise, more options would be nice, but not required. Game provides tutorials in the form of VR missions, which are a welcome addition as they allow players to practice. 9/15, camera is a minor concern but overall, good.
Lasting Appeal: Its use as a stress reliever helps out here. It can be played in short bursts, and then put aside. Playing straight through is not recommended with a game like this. A difficult one to rate objectively. Having to play the game in a specific way to garner enjoyment long term is a negative, but the PDF (pure dumb fun) and Catharsis factor boost it. 8/15 As a game it is a short quest game, worth one playthrough. However, one cannot ignore the catharsis generated by vivisecting and quartering a video game dude. That and the availability of more than one mode helps push it up.
Overall: 8/15, average but with slightly more good than bad. A good budget equivalent is Warhammer 40K Space Marine, which occupies the same blood and gore cathartic space, but lacks the sheer scale and modes of spectacle of MGR: Revengeance.