Wow, where to start. Firstly, as always, Play.com had it on my doorstep the day stated. The download pack came the day after, so top job there.
Right, the game. For those of you who played the original Mass Effect and enjoyed it you are going to love this. All the little things you didnt like have been fixed, the combat is more fluid and realistic, the inventory simplified and side quests are really enjoyable for once.
Hacking and security bypasses involve new mechanics as does planetry exploration. All for the better.
Cinematics are excellent as is the story in general, I often find myself playing just to get to the next cutscene they're so good.
For newcomers to the trilogly dont be worried by the backstory, if you dont import a ME1 save you get a rundown of previous events.
ME2 is a third person RPG shooter thing where you fly your space ship round the galaxy picking up a team of experts to take on a threat to the galaxy...simple really. An excellent story, much improved third person combat and more interactive quests and characters make ME2 unmissible for any ME1 fan, and a must play game for any newcomers...expect to watch the hours fly by.