Non spoilerific impressions.
Short Version:
Wow
Longer Version:
After avoiding anything on the internet regarding this game for a long while, I have finally gotten the chance to play it. I avoided the demo as well, because I wanted to know little, as that is what I believe makes up a Metroid game.
I started a game for the first time, with a crowd of Metroid fans watching, and I plowed through the introduction. Phases like "Now THAT'S an elevator" and "HOLY cow" were quite frequent. Simply amazing. After the intro was done, I quit, as I did not have a blank memory card around.
So, we went and started a round of multiplayer. Not expecting much, I was blown away. The four of us playing are more then adequate when it comes to gaming, and we had an absolute blast. It was a shame this mode revealed powerups from later in the game, as I would have much rather discovered them for myself. A warning to those who want to play a "pure" metroid game, avoid the multi player until you have finished the single. Beams and upgrades at least are revealed in this mode. It makes it metroidy, yes, but it kills this single player experience some knowing some of the not before seen upgrades you are getting.
For the record, I haven't finished the game, so I can't offer a full review, but I am nearing completion, so I feel these to be accurate impressions.
The boss battles thus encountered are awesome. The last one I fought was just "eh", but the others were AMAZING. I beat the second to last boss in prime (MR) with 7 health on my first try left 2 years ago. The adrenaline was unparalleled in gaming up to then. These bosses aren't cut that close, but offer a very similar challenge, experience, and thrill. BIG plus. The music after each boss is also so cool as well, it is hard for me not to rate the game highly due to just that.
The load times are still seamless, but not so much masked anymore. Where as elevators were used as loading spots before, there are additional forms of loading spots now, and they can get fairly tedious. That would be the biggest complaint I can level at it thus far. None of the objectives or puzzles would seem tedious or boring if it wasn't for those, but as it is, I can see how people can and will be annoyed.
Suffice it to say, my brother loathed Prime. He is a big Metroid fan, but didn't like the atmosphere of the other game claiming it to be "Not Metroidy _enough_". Ironically, contrary to what most reviews have said, he has fallen in love with this game. I have not heard one bad word from him about it come out in the time I have had it.
Awesome game. Recommended on a whim.