I got recommended to play Super before Zero Mission, which I would suggest against. ZM it's pretty much on par, but more accessible, less clunky, and shorter. And in terms of gameplay, I think it's just as fun, even though easier. But what I'm missing is the unique atmosphere of Super and the little moments that added to the story and overall impact of the game (like Crocomire and a certain cute interaction at the end). So overall, I don't have much to say about ZM. It's a decent Metroid, but not as memorable for me.