Absolutely amazing. After I finish it all I could think about was how bad I wanted the third game to come out next week.
I think they´ve kept the quality level on the main quest. Not as epic as the first one, but definitely epic, and they´ve improved A LOT the side missions (the squad members missions are top notch in terms of writting). What I liked the most is that they´ve removed tons of bullshit of the first one. I mean, the car parts, planet exploration, tons of equipment for each member of the squad (special ammo, armor upgrade, etc), tons of useless weapons, etc.
The new system is much better. There are like 2 weapons of each type in the whole game and is dead obvious which one is better, so you don´t have to keep comparing charts. The customizable armor skin is also cool as you don´t have to walk around on a terrible outft just because the cool black one is shit in terms of defense. I also loved how the class determines the weapons you can use instead of which you can upgrade. The special powers are awesome too, I played as a Vanguard and loved the rush thing. They really improved a lot on everything. System, gameplay, combat, graphics, classes... I wish they could remake the first one using this new system.
They also did a great job on the new races. Awesome design. IMO The Mass Effect universe pwns any other sci-fi universe ever written or filmed. The only thing I missed was the citadel epicness. On the first one there were tons of side-missions, embassis, statues, the round atmosphere. It felt like the center of the universe, where all races and cultures converged. On the second game is just a small bunch of corridors.
awesome