Meh
I don't have much words for this game. Is like mixing Ninja Gaiden with a Metroid skin.
The combat works well and all, but there are a lot of bad decision, mostly in how Samus acts compared to what we all know about her. She just follows orders and doesn't use several weapons until the guy in command tells her she can.
Exploration is pretty much taken out completely from the game for a straight line of combat. Some common Metroid games concepts are thrown in, but it doesn't make up for what has been done wrong.
Hopefully next time Nintendo will keep a closer eye on the decisions external develpers take on their franchises.