The battery life is adequate at best (I expected perhaps a little too much).
The iPad Air 2 is a bit hard to engage in the hull (and it is equally difficult to remove, I think), and the external appearance is rather cheap (the plastic is low-end).
And the big weight remains the least: it feels to walk with a brick, once set iPad and it's a shame (again, when we see what Apple can do in terms of sharpness and weight, there is inevitably a little disappointed).