I love my G1X. It's not too big and the image quality is superb.
However, I have to say that after using it for many months it simply isn't fast-enough to be used by parents with children. If you're in that category - forewarned is forearmed.
(NB. For everything but fast moving subjects the G1X excels.)
I'm brand agnostic and there are Canon camera's in the same price-range which I'm sure are faster. Prior to this my last Canon compact was an S90 and I feel that was as fast as the G1X even though it was sloooow.
It's a shame but, with a toddler to take pictures of, I simply lose too many moments to movement with the G1X. Focus is too slow to lock and manual focusing, driven by buttons, is no faster.
I hope the G2X is much more responsive, or gives us back the dials and buttons we need to make setting the camera up fast simple. Today I was trying to grab a moment and had last been shooting outside at F16. By the time I'd reset the aperture (I was in Av) and locked focus the moment was gone.
I would love a manual focus ring around the lens with peaking. That would be the fastest way to compose a shot. It would also help if auto-ISO used the entire capability of the camera and didn't top-out at ISO 1,600. Without that limitation I could have got a rough, but actual, ISO 12,800 shot at F16 instead of a blur.
Another useful feature would be an automatic buffer as Pentax provide. That allows for shots in JPG mode to be saved as RAW by pushing a button. It allows for burst mode shooting to result in a RAW file.
I'd happily buy a G2X with the same sensor. It's great. I just want more speed. Casio and the Nikon 1 are the benchmarks. Even Panasonic's FZ200 makes it a priority. Continuous AF and 4+ RAW frames a second and I'll be a very happy customer again.
If anyone knows of the fastest RAW shooting compact I'm all ears. The Casio Z1000 is not in the US and has a small sensor. The Nikon 1 is fast but I don't really want interchangeable lenses on my "cary" camera. I will keep the G1X but want something tiny and really, really fast.