I have a slight case of buyers regret with my G15. It handles beautifully, has quick AF, has that fast lens and a raft of other attributes that are well documented. But it's not a pocket camera. That's the role of an S110. So seeing as the G15 failed to qualify as a pocket camera, I may as well have gone for the slightly bulkier G1X and benefited from the obvious qualities that the bigger sensor will deliver. Where I have the greatest frustration with the G15 is the dynamic range. It's probably class leading for such a tiny sensor, but the way the highlights blow so abruptly has soured the overall experience.
Still, while it was fun to have for a couple of months over Christmas, I'll take a hit on it and push it onto the secondhand market or give it to one of my kids. I'm so used to 1-Series and 5D3 files that the quality drop is hard to swallow. Maybe the next generation M series will do it for me...
-PW