I bought a new Pen F last month, and promptly upgraded to firmware 2.0. Then I had a series of camera failures. It would just go dark, as if the battery had died. But taking the battery out and putting it right back in would reset the camera, and show plenty of charge on the battery. Every shooting session this would happen a few times. I thought I was the only one, but then I discovered this thread on DP Review: Re: Olympus PEN-F lock-up / freeze / unresponsive after updating the firmware to version 2.0: Micro Four Thirds Talk Forum: Digital Photography Review There's a guy in Germany who has figured out how to downgrade to the prior firmware, and that solves the problem. https://lightsnowdev.com/Olympus There is the usual corporate failure to acknowledge the problem, although some say a corrective update is coming in June. Otherwise, I love the camera.