I picked it up on Friday done 100% completion after 14 hours of game time (I'm going to fail my exam on Monday), first Prime game I went for the 100% its an absolutely awesome game.
Note to Rus
you should definitely get the first one, Metroid Prime is probably the best in the trilogy, probably, (although corruptions control is awesome and looks great too) Prime II: Echoes was good but felt different still fun though. Don't need to in terms of story but it makes the experience sweeter at the end.