This game is marvelous.
I bought it the day it came out (complete with fuzzy wuzzy Yarn Yoshi amiibo — D'AWW!), but I've only been playing it when one of my best friends is over. We're going through the entire game in co-op.
We usually hang out on Friday nights, so it's been slow going, but we're now on the fourth world. And man, what a game. Part of me does wonder if I'd burn out on it if I played it regularly... but taking my time with it, it's just a wonderful experience.
You definitely need to let go of any OCD completionist tendencies to fully enjoy it, though. There's just so much STUFF to find. We're focusing on the Wonder Wools first (best collectible in a Mario game? Quite possibly!) and the Flowers second. Not too worried about the stamps, lol.
Everything in the game has such a good feel to it... And I just realized I unwittingly made a pun! But it's true: From the way the fabric floors deform under Yoshi's feet, to the addictive unraveling of walls and enemies, it's a very tactile game. And OMG, the motorcycle minigame is ridiculously fun. It could be a full-fledged game in its own right. YOSHI CYCLE!
Also, the soundtrack is a sleeper hit. Between this OST and the one in Transformers: Devastation, there has been some great music this quarter.