The power button is bad. It takes A LOT OF effort for me to be able to push the button. So I have to spend another $70 to buy a sleep cover so that I can more easily put the device to sleep. Imagine a plain low-tech cover costs for $70! Yet this is not the end of it. Then I find from time to time the touch screen does not respond at all. And I have to try hard to push that power button to shutdown and restart the device!