Canon Powershot SD780 IS / IXUS 100 IS Review at CNET Australia – Editor rating score: 8.2 / 10, and Alexandra Savvides says:

The photos that the 100 IS delivers are full of that punchy and bright colour that you’d expect from an IXUS compact. Images were relatively sharp from corner to corner though there was a little fallout at full magnification as you reached the edge of the frame. Barrel distortion was rather prominent though, and considering the lens isn’t exactly wide this was a little concerning. That said, it’s not something you would notice in everyday use, and only really exhibited itself in a controlled environment.

Alexandra has also recorded a 1:26 video overview of the camera.

Video overview of the Canon SD780 IS  IXUS 100 IS by Alexandra Savvides