I bought a G10. I originally wanted a G9 cos of the focal length was better if I remember correctly. The 2nd hand G9's were fetching a higher price than a new G10 at the time.
The image quality was superb at lower ISO's on the G10 and made a great holiday camera, but unfortunately I had to sell it due to being skint.
It is a bit bulky compared to other compacts, but great when you didn't want to carry a DSLR around.
Never tried it at high ISO's, but told it gets too noisy after 400.