I've had three now, when the current one goes back I won't be getting another…
First one was an open box (despite being sold as 'new') and had terrible backlight bleed across nearly half the LCD display, the second one had a couple of duff pixels smack bang in the centre of the display and the third one's lense is so poor the entire righthand third of the image is out of focus. The bit that is in focus isn't particularly sharp either.
It's a shame as the camera seemed to tick all of the boxes that the LX3 didn't (ie good colours, small and a semi decent zoom, I can live without the HD video), but I'm dismayed at the lack of QC for what is supposed to be Canon's top of the range camera.
If you get a good one I'm sure it will be a keeper, just make sure you look for the known faults (and accept, if that's what you want to do) as soon as you get it.