If I was only/mostly used an iPad on a desk, I'd get the 12.9" no question. But it's really weighty at the extra half pound when holding it in your hands like a magazine, also way too big and unwieldily to use it in a relaxing manner on a couch or chair. The point of the iPad for me is to be something that is ultra portable with long battery, so that means it can't be too heavy or big like a MacBook Pro can be