Ok, this was my gift to myself on xmas and I just 100%d it, i would say a solid 2d Mario , i enjoyed new super Mario 3d world more though, a ton more endgame things and with wonder, you just get these medals you can hardly see.
challenge wise, it was, I would say, very easy, bar two levels, the timed wall kick special level and the final, final special world level .
a lot of the power-ups were meh and of all the abilities I only used one for most of the game.
still, nice to have something relaxing and not too rage-inducing. has co-op to play with the kids too, so yeah, i would recommend it, but like all first-party Nintendo games, it's pricey