My mom and I are on 4GB data plan and unlimited text / talk. We don't even get to 1GB but I'm glad we had this as one weekend I had no choice but to not be on wifi.
News for AT&T users. I was told if we don't go above 2GB and are on 4GB plan you can contact them before payment and they will backdate your account making it look like you are on the 2GB data plan. This = money saver.