Been playing the ever-living crap out of the Mass Effect 3 multiplayer demo with a couple friends. I'm so addicted to leveling up my char and unlocking new stuff. So far the Sentinel and Adept classes appear to be the most fun. Sentinel is the ultimate Tank class and Adept is great for just spamming your bio powers. If you do check it out, I recommend using a class based more on bio powers and using only a Heavy Pistol as your primary weapon, with no secondary. Having the decreased weight allows you to not only regenerate health/shields faster, but also regenerate your powers faster as well. Spam bio attacks fer dayz.