Had an E-510 and E-5 for a long time and then switched to Canon while I thought Olympus had given up on the "E" series. Finally switched back when I heard about this camera and it was worth it! The weather sealing is fantastic- took it out in a snow storm and while everyone else was huddled under a plastic bag trying to protect their camera, I was shooting away with the body and the 40-150 Pro weather sealed lens. Images are sharp. Autofocus is fast. Viewfinder is high quality. Love the menu set up and ease of use. Function switch makes it so quick to change a variety of settings including f stop, iso, white balance, and shutter speed.
My only gripe is that white balance accuracy could be a little better- but that's nothing some post processing can't fix.
Now if only there were an update to process the RAW files...