I just checked our data usage for the last few months. I normally use 1-1.5GB, my wife is anywhere from 1.5 to over 3.0GB, trending on the higher side of the scale. That's more than I thought. There's no way we could comfortably use the 4GB plan, looks like going up to the 6GB plan would put us about $10 more a month than we're paying now... I still have almost a year until it's time to decide...