It looks amazing for the hardware. Very impressed...
The game, on the other hand...not so much...
It really seems like all he was doing was going from room to room shooting the same enemies over and over again. Each room was rather small and simple from a design standpoint. It just seems like a simplified FPS to me, not a Metroid game (which he openly admits). There is at least a little platforming present, which gives me hope that they will use plenty of it. I would also like to see some really creative morph ball puzzles, as the controls seem excellent for that (the little maze is a start, I suppose)...
The music quality is also quite disappointing. I was hoping Nintendo would get on the ball this time (they really could care less about sound, it seems).
Also, the way he talks, you really get the impression that he knows very little about the actual series.
I noticed that he slammed the controls in Prime as well, almost as if it were the fault of the pad itself.
Still, the game LOOKS very very good. At 60 fps, I'd say it stands above most anything on the N64 and hints at what could be coming down the pipe. Also, the control scheme seems to work very well and would allow for some very smooth camera adjustment in a number of games.