After a month of fairly solid play, I finally finished Halo 2 today (it would have been quicker, but I played on the "heroic" difficulty level which made for slow going). It truly is an outstanding game, probably my favorite game ever. The storyline is fun and the game play is outstanding. The music and sound effects are also very good -- this is an area where games often fall down. It's quite a testament to the designers that they were able to create such a great game on such old hardware (over 3 years old).