This game is by far the best game on the xbox, i have played both mass effect games which i thought were ok but this leaves them trailing. The sheer size of this game without any add on packs is nothing short of incredible. The characters are great, great story, the upgrade system is great, the amount of items, armour, races, weapons, skills, specialisations, spells is amazing. There is so much to do and after completing it i went and started over again.
I bought this version after buying the original, but this actually works out cheaper than buying all the dlc seperately. The DLC comes on a disc of its own and needs to be installed on the hard drive which is worth considering if you dont have much space on your drive. The dlc is actually very good and adds many more hours to the game, there are new spells, abilities, items and characters.
I would highly recomend this game