Just played some MP. It's a lot of fun, but pretty difficult. I think what's throwing me off is that the controls are slightly different, no doubt so you can't pause the action to open a wheel of weapons or powers. It makes sense, but without a tutorial it takes a few rounds to understand. Plus, you start off with very little in terms of weapons and powers and kit, so you're pressing a button looking for something to happen and it doesn't.
It plays like a furious Mass Effect battle though, and that's what counts. I'm already enjoying tricking out my characters with new kit and what not.