Summary: Love the look and feel of the camera, but the one we received does not take acceptable pictures in daylight. Washed out and overexposed in all modes. Sent to Canon for repair - stated 7 day turnaround but still waiting after 14 days. Should have returned it to Amazon.......... 8/30/12 UPDATE - Repair comments from Canon indicated "the adjustment of the optical assembly and exposure was incorrect. Electrical adjustments were made".
Summary: I waited 9 months to write this review to really get a feel for this camera. It's been okay but not great. My previous canon took much better (clearer)photos all the time. I think it's hard to get the macro function to work well without having to pick a focus area repeatedly which means you might lose your picture taking opportunity or get so frustrated you just walk away. The auto option takes so so pictures.
Summary: I bought this camera at the end of 2010 and a year and a half later it is non functioning. (just after warranty expired) This is an expensive camera to only last a year. I must say, I thought the camera functioned well for the year and I loved the images I got from it. I loved its versatility, it was terrific in that regard but I have been a professional photographer for nearly 40 years and always had Nikon cameras.
Summary: I bought the G12 in 2010 after buying into all the positive comments about the specs and build quality. Build quality is excellent and I havent seen any other like it so far. But the reason for my 2 star rating is this: extremely slow from shot to shot, auto-focus also slower than several cheaper P&S cams. So if you have kids or pets and want to get creative using the PASM modes, forget it. Even auto mode is slow for me.
Summary: I noticed after about 14 months of light use that my G12 lens had developed a couple of scratches. From the internet I get the impression that the sliding lens cover may have contributed to these scratches. Many complain of this. So beware, don't store the camera with anything touching the lens cover. There is very little distance between the lens cover and the lens. Needless to say, I'm not too pleased.
Summary: I have a G10 and, like many other G10 owners, the lense is scratched due to the design flaw in the closing mechanism. The G12 has the same problem as evidenced by the many comments you can find on the web. Canon has an insulting "loyalty" program where they will trade my defective G10 for a REFURBISHED G12 for $350!! A new one costs $399 here on Amazon! I paid close to $500 for the G10 and it lasted about 2 years. I'm used to cameras lasting a lot longer than this.
Summary: I just bought this camera. Don't buy it. You'll lose your video and photos. I took a couple hundred photos and a number of videos on a 32 GB with this camera. When I got home nothing was on the card. No where in the instructions does it say it won't work with a 32 GB. Why did it say it saved photos and videos, when it wasn't. Apparently it doesn't work with 32 GB, and you'll find that out after it is too late.
Summary: I purchased this camera, and ended up returning it, because I wanted a fast shutter release and optical viewfinder for taking pictures of dogs and horses, whose movement can frustrate. While I have a Canon DSLR, I needed something smaller and lighter for walking around. Unfortunately, the G12 did both things poorly and only one trip to the field made this clear. The viewfinder was worthless and the shutter release too slow.
Summary: Regardless of lighting, this is a terrible point and shoot camera. Pictures are only okay when they're very small, but something is clearly wrong... Blow them up to actual pixels, and features are utterly indistinct--not even grainy but without form! On a tripod it's not much better. In manual mode, picture quality is much better than in auto mode. Still detail does not begin to approach that captured with Canon Digital SLRs. It's not a step but flights down.