Rented this game and played this the last few days. Overall, it's a cool reminder to my youth, it's a satisfying play but in the end was a poor Nintendo product and like some critics we all know... another cash grab.
This game is unplayable with 2-3 players, much less 4 players. Some levels require such an amount of skill to get by that it takes just one poorly timed jump to kill several players. I don't see much of a reason to even play MP to be honest, there's no COOP other than pressing A to get by a few jumps to your friend who already did them. That's not COOP it's going through a stage easily. I wish if they would have implemented a few things players needed to do to time things to get through the stage...nothing. The game lags whenever someone gets a powerup, when someone dies, when someone jumps, when someone crouches, honestly... why is this game lagging with as little as 2 players? What is with 2 Toads? That's just lazy.
Boss battles are cool though. Especially vs bowser!