I have a 16 GB 3G original iPad. I am planning to get a 32 GB Wi-Fi for my next iPad. I will be keeping both. My son will be able to use the original and I'll use the new one. I don't always purchase the data plan for the original but would like to now have data for both. I think I'll just get the AT&T mifi and get their 3GB of data plan. Besides the fact that I'd have to carry the mifi around and I'll have to turn the mifi on before I use the iPad, what are the other downsides I haven't thought of?