In reply to PPP:
I have X20. Very pleased with it. Lots of flexibility with controls, which are largely well-conceived and easy to use. View is great, though doesn't quite convey as much information as the LCD screen, but I'm grateful to have a good non-SLR with a viewfinder (which I regard as essential for outdoor use).
Battery life - I'd definitely carry a spare battery if away for more than 4 days with no access to charger.
I find the size & weight of the camera ideal for mountaineering, it's not obtrusive when clipped onto rucksack shoulder strap, and easy to use for quick snaps while moving.
Very happy with JPEG image quality. Haven't used RAW much yet.
hope that's of some help.