In reply to peakpaul:
I can't help with the M3 I am afraid, but I have had the mk1 for a while now (all the photos on my blog since the Cuillin Ridge in April 2013). I think it's a brilliant camera which is small enough to take out climbing yet still takes fantastic photos. Mine has been dropped onto rocks, into small puddles, used in wet winter conditions and is still going strong. I can also just about use it in big winter gloves, but changing settings does get a bit fiddly.
Post edited at 21:59