Meh. It's fun, don't get me wrong, as well as more challenging than most games today, but I feel it was overhyped. I found out I was breezing through the game on the hardest setting without me knowing it and it really wasn't that bad. I think the supposed "challenge" comes from people dying at multiple stages of boss fights because their entire arsenal changes up and if you aren't familiar with it, you'll probably die. That being said, it shouldn't deter you from buying it. It's fun, unique, and it has potential to last a while, depending on if you want to get a perfect score on everything. If you are pretty casual like me, I see it being a one or maybe two playthrough kind of game, as it doesn't seem to have a lot of replayability once you know the boss mechanics, and in my opinion, the fun comes from learning them :P