I am currently playing this game so I know what I like. This game is really quite challenging. I can tell you I have gotten stuck in quite a few situations but I always end up finding the answer.
The first quarter of the game is kind of a minor drag kind of because you have to keep going back and forth constantly through it just to do one main objective. Otherwise a lot of the upgrades are pretty awesome once you see them for yourself.
This game may also be a must for the loyal Nintendo Metroid fan. The graphics are fantastic and the Wii mote interaction is also a bonus. It seems sometimes to my friend as he states "It's as is you are really doing it". If you ask me he is a little nuts. But really my main man beat this game the fastest he did it is 15 hours so all you metroid fans out their just try to do the under three miniute trick. Just try it you are just wasting your time trying.
The one main flaw I find in it is that You have to be pretty close to the television for it to receive signals accurately. So if you got the Nintendo Wii I recommend you go out and buy this game because this game rocks.