The BEST gameplay and story in the series. I've completed it 100% on Hard mode, and I can't say that any other Metroid game has had me desperate for more content. The music is the only lacking part of the package, but can be easily overlooked as you explore masterfully thought out labyrinthine areas and fight awesome bosses. The sequence breaks are still here, I did a handful on my first playthrough and it felt like the game was rewarding my intuition. The final boss is probably one of the best of all time without exaggeration, and a fantastic sendoff to this arc in the Metroid series.