Ok, so I just came back from playing Metroid Prime for an hour. So far, so good. The atmosphere is right, the controls aren't too difficult to learn. I made it to the first boss (and that's where I die). Of course, I'd probably find it easier to play if I had more experience with FPSs (especially where shooting enemies is concerned), but it is Metroid alright.

Oh, and I like how the old Metroid music is back (including the theme from Super Metroid when you get an upgrade).