Chances are you'll be fine gaming on that MSI laptop, however don't expect to be able to turn the settings all the way up and expect it to not slow down. That's the largest caveat with laptop gaming....it's like ram1009 said, it's just not up to snuff.
That being said, I game on my laptop just fine. I am okay with lower settings getting me acceptable framerates. I don't need AA turned all the way up on a laptop anyway, because what's the use? The panel, though it might be bright and true to color, is no where near as sharp as my wife's 23" IPS monitor.