We have the Canon G9. For a P&S it's decent, but nothing compared to the image quality and ability of any DSLR. The sensor is small and at ISO higher than 400, detail becomes very smeared and chromo noise gets bad. Shutter lag is annoying as is the AF timing. The lack of TTL flash when in manual exposure mode is kinda dumb too.
Good things: P&S size. The zoom range is adequate. good images at ISO 100-400. It's relativly cheap, so if it's stolen at Disney, not the end of the world.
Granted, this is coming from a pro photographer used to top end DSLR. The G9 is "top of the line" when it comes to P&S cameras, but I feel it's borderline annoying when you are used to good equipment. Personally, I really enjoy using my SLR and as much as I hate the weight and size, Im tempted to take the SLR to Disney again over the G9.
Last time I carried a D200, the 18-200Vr lens, and a 10.5 fisheye and it wasn't too bad. Obviously the G9 is pocket size and portable, but Im always wishing I had a full capability camera instead.
Note: DH typing