I originally bought the Sony W90 based on specs. My first one was defective. It took pictures, but only the pictures in very bright light were acceptable. I exchanged for another W90 and although better, it still had VERY high levels of noise even with flash. I returned that one and bought a Canon 800IS. The Canon has taken EXCELLENT pictures even in low light. The image stabilization works well and the pictures taken with ISO 1600 are about the same noise level as the sony at 400 and 800 ISO. At 800 ISO the Canon produces better pictures than the Sony at 100 ISO.
I'm trying to decide whether to go with either the 800IS, 850IS, or the Sony DSC-T100. I guess pic quality is the most important, and I usually trust Canon images above all others in this class....but I really love the size and design of the Sony, especially the sliding lens cover which powers it up. Anyone have an opinion?
I have the Sony T10 - I got it for the design and the unlimited in video mode, but I hate the sliding lens cover. It would slide off at a small touch in your purse and ppl who helped you take pictures would put their fingers on the camera lens :P Get the Canon!
Be careful of sliding lens covers. I have a Canon Powershot S40 that has a sliding lens cover that powers the camera up. The problem comes when something happens to that lens cover (mine is starting to break) and you can't power your camera any more.