I literally just changed my iPhone 4 unlimited data plan ($30 a month) to the 5GB data pro plan ($50 a month) with tethering to use with my new WiFi only 64GB iPad 3rd generation. It's cheaper than if I bought the 4G iPad and a data plan. It will be more than enough data for both devices for me and I save some $ while still getting internet data access on my iPad when I'm away from a WiFi hotspot. Did I make the right choice? I don't use close to 5GB a month on my phone and I am usually always near a WiFi hotspot, so I figure 5GB is more than enough. What do you think?