I had one of these for a few months and I had to send it back due to "Deep Sleep" issues. Once the monitor was turned off or would go to sleep, it wouldn't turn back on. I will also agree with the headache part, it is crazy bright for anyone with bright light sensitivity.
I made the switch to Bing a month ago and I've never looked back. I've even been using their maps program on the PC and iOS and it works great. Nothing like getting gift cards for using their services.