I'm not at all disappointed.
While it is extremely different from the series Prime, but several passages refer to Definetely big brother Super Metroid (SNES). The next "narrated history" seem little bewildering, but it does not take much space as that. This aspect should not hold you back because it is a pleasure to learn more about Samus! :)
The general realization is good, remembering the staging of Metal Gear Solid (PS) is saying!
Sometimes you'll have to carefully scrutinize your screen to allow the story to move forward, A magnificent find of immersion.
The gameplay is pretty good even if the use of the mode "FPS" for the use of the grapple or missiles can be a nightmare as it is demanding. Nevertheless, the difficulty is balanced, and this is the challenge, even for the most Aguer players.
In short, if you are a fan of the series, darken!