This game is both good and not so good. First the good part. As the storyline goes and as the challenges go in this game, the game get's to be close to perfect. Just like the first Metroid Prime it is graphically so intense and so beautiful that this by itself is reason to buy the game and wander around. The storyline is original and great to read, but with this i also get to the 'not so good part'. This game is highly repetitive in nature. And i mean with that the things you did in game 1 and the things you do here.
Some of the bosses are a lot easier, which makes it more a walkthrough then a complete challenge, in that way the first game is better. But make no mistake, even with these weaknesses, this game is an absolute delight. The scanside is a lot better to see. the way it is setup, makes it a lot better to reach 100%, which in itself opens up other things. The music is still a giveaway. it is good, but if you listen well, then the music will give away the moments you can expect a fight (not so bad).
Even with the flaws i never regretted buying it. I am certain you will not regret it either.