This is my least favourite game of all time, and Metroid is my favourite series. All the levels are composed of 3 rooms which are repeated over and over again ad nauseum. This, along with the fact that there's no map, makes it far too easy to get lost, and not in the good way. Enemies almost never drop missiles and missile recharge stations are rare. So if you run out of missiles (which are required to kill the Metroids), you're screwed. There's one boss in the game. The jumping is so floaty. Spider ball is too slow. Some of the larger Metroids have awful hitboxes and terrible AI. You can see a Metroid in plain sight and it won't move, but at the same time your missile fly right through them. This game is awful and it breaks my heart whenever I see people get excited about getting this game through Club Nintendo.

Metroid II the...SECOND best Metroid game? :?

Second worst would be more accurate, The only metroid I could maybe see be worse is Metroid Prime Hunters, but even then I wouldn't know. Metroid II is nowhere near as good as other Metroid titles.