I have a GX1 and a bunch of Panasonic Lumix lenses (7-14, 14-45, 45-200 and 20mm). I just bought a new OM-D with the 14-42 lens, received it yesterday. Yep, it's nice, and I like the fast burst rate. But beyond that, I am not finding a whole lot that makes me want to keep it. The user interface is super clumsy. Stuff that is easy to do on my GX1 is an exercise in frustration on the OM-D. Even getting the door open for the USB socket is more difficult than it has to be. You have to swing the display out to get to the edge of the door before you can open it. Only Olympus could have a setting called "+ IS Off" that defaults to "On" (which actually means IS won't work with high speed bursts) and if you want IS to work during high speed bursts, you have to turn it "Off". What kind of twisted logic is that? If the image quality of the OM-D is better, I sure can't see a significant enough difference to justify 2X the price. (Actually, I can't see *any* difference, but I haven't done exhaustive testing). I want to like it, and even considered keeping it and selling my GX1, but the more I use the OM-D, the more likely I think it will be going back for a refund. I'll give it some time (I have 30 days to send it back to Amazon), but so far? Not sure it's a keeper.