A Marvelous Title, well worth the terrible pun
M: UA is the best hack-and-slasher I've played in a while. The graphics are outstanding and the visuals are actually pretty good. The selection of characters is quite robust, with some notable omissions that, thankfully, are being addressed by a content download. You even get some moderately obscure characters, such as Moon Knight to play. The enemies do seem to be repetitive, but the sheer chaos on screen makes it hard to notice it. The frame rate, astonishingly, stays rather consistent even with tons of explosions on screen. Some characters, admittedly, do seem to be overly powerful --- Captain America, with a fully powered shield attack, is nearly untouchable. While the game ITSELF is not overly difficult, the bonus "comic missions" ARE significantly difficult. Spider-Man's mission is an exercise in difficulty that is truly incredible. Mr. Fantastic's mission is hardly easy, either. And the search for alternate outfits is not just a sheer waste of time as the different costumes present different statistical upgrades to the character. Black Spider-Man and Red-and-blue Spider-Man do not play identically. You can also mix-and-match teams, each with different benefit attributes.
If I had to nitpick, I'd say the multiplayer is a problem. Lag is a huge problem with the title and makes co-op missions nearly unplayable. I've never NOT had lag while trying multiplayer, so I'm going to have to guess it's not just my connection as it's not a problem in all games. Also, the Pitfall game was bad, but it only lasted 3 minutes, so it is very nit-picky to mention it.
You really cannot do much better than this title. It is an absolute blast to play. Highly playable. I highly recommend it to anybody.