The S9100 is the perfect size and feel for a pocket camera. It looks to be all plastic, but the type of plastic and the quality of the build makes it look and feel like the best small cameras made these days. Startup time is about one second, and going from minimum zoom to maximum zoom takes about two seconds. Image quality is very good for a camera with a 1/2.33-type sensor, but certain very fine details like hair, or a bird's feathers in a low-contrast part of the bird's body may be smeared somewhat. This is apparently caused by the noise reduction software in the camera, which can't be turned down or off. On the other hand, my Canon SX-210 (which I replaced with the S9100) does not reduce noise much if at all, and the end result is a compromise between the two systems. I think the Nikon S9100 wins in that compromise though, since the images on average look better than the SX-210's. Pocket cameras that have much larger sensors (and consequently much less zoom) can often produce a better image with less noise, but you have to give up the long zoom, or put up with a much larger camera.
In my tests of the S9100's videos, using the highest quality 1080x1920 (1080p) setting, I did not see any clear superiority over the 720p videos from the Canon SX-210, or the Panasonic ZS3 that I also own. The ZS3's and SX-210's videos use about 3mb per second of filespace for the 720p movies, yet the Nikon S9100 uses only about 1.8mb per second to record 1080p movies at highest quality, day or night. Even if the S9100's video software is much more efficient, it doesn't account for such a disparity. 1080p is 2.25 times bigger than 720p in resolution, so I would expect 6.75mb per second if using the same video codec as the 720p cameras, or perhaps 3.5mb per second if the S9100's codec is twice as efficient. In any case, I don't see a major problem with video quality on the S9100 - where I have a problem is holding the camera steady when shooting movies at maximum zoom. Still photos are not much of a problem in good light, because the shutter speed will be high enough and the image stabilizer will help out. So I would recommend using a tripod, or bracing the camera against a solid object when shooting videos, especially at maximum zoom. If you use a tripod, or place the camera on a solid object so that there is no camera movement at all, you have to remember to turn the image stabilizer off or the video will not be sharp and clear.
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