Canon PowerShot A2000 IS review at CNET – Score: 3 / 5 stars, and Joshua Goldman has this to say on its image quality:
As mentioned earlier, for a low-cost compact camera, the A2000 IS has first-rate photo quality. Color, contrast, and white balance are particularly good. As is the norm for this class of cameras, the A2000 IS shines at ISO sensitivities below ISO 200. Grain becomes readily noticeable at ISO 400, but for the most part details remain unexpectedly good. You can increase up to ISO 800 and still have a usable photo at smaller sizes. This is great since it means shooting in low light isn't completely out of the question, as long as you're not expecting very sharp, detailed photos.