Bios Magazine posted a review on the Canon Digital IXUS 90 IS (PowerShot SD790 IS

Canon's Digital IXUS range is arguable more concerned with style over substance, but frankly it's not an issue for those who want to capture images quickly and easily. Every Digital IXUS we've ever used (we're still using the Digital IXUS 950 IS) has been a dream to use and produced excellent shots with minimal fuss. The Digital IXUS 90 IS is no different, and although there's no ground-breaking photographic innovation the build quality is second to none and image quality (both stills and videos) is well above par - images are crisp and colours are accurate, at least at low ISO modes. The only big disappointment is that Canon skimps on memory, providing an almost good for nothing 32MB card. Still, flash memory is cheap these days and you can pick up a good 2GB card for under 310.

Canon Digital IXUS 90 IS (PowerShot SD790 IS) Review