The game is pretty good so far. It controls better than any other FPS out there on consoles. Storywise, it's getting good where I am, and considering I have beaten all the other Metroid games, I'm very excited as to how this one will tie into Super Metroid. The visuals are the best on Wii so far, as it is very clean and the detail in the levels is good. This is one of those games where you wish Wii supported HD because it looks so good.
The problems I have encountered so far is the door lag. Sometimes it takes a really long time to open, and when yo are trying to get away, its not very fun to be getting shot at. Another thing is that the controls for the morphball jumping don't always register on time, and you end up jumping a little after you had done motion. I also feel like I'm getting stuff too quickly, but then again, maybe the game has more new stuff for me to get. A cool feature they brought back was beam stacking. Instead of switching between weapons, the new beam you get retains all the properties of the old beam. I think I'm about halfway through, but the music is great, the visuals are superb, the boss fights are intense and strategic, so everything is spot on so far. I hope it delivers a grand ending to top it all off.