I am a HUGE Metallifan. So, having an Xbox 360 it was natural to want GH:M.
The delivery was on-time, and the game arrived undamaged.
Playing the game: The game is much like all the others in terms of gameplay - holding the buttons and strumming etc. However, the songlist is a must for any Metallifan, and even a must for general players. Sure, some of the earlier songs (Dyer's Eve in particular) are near impossible for me to play on hard - but one must be challenged or it's no fun! But, there are more than enough hits to get you headbanging!
One word of warning though!!! The guitar controller seems a bit...flimsy. After about 3 weeks of playing, the controller seems to strum itself - resulting in a loss of multiplier and much frustration. Also, the slide bar does not work well for me - but I just use the normal buttons for those sequences anyway.
So, to sum up: GH:M is a loud and heavy assortion of Metallica hits and other good(ish) songs. However, go carefully with the controller as it can be a bit temperamental sometimes! Might be best to use the GH3 one if possible.