CCD noise is very well controlled. For the price, this is excellent. The Scan Dual exhibits good colour rendition without needing a great deal of calibration effort, and it should be possible to improve this further with a little careful use of the scanning software's controls. The lack of focus doesn't seem to affect sharpness, which is as good as any. Moreover the low level of CCD noise is exceptional in a low cost scanner.
Some users report difficulty getting good scans from some colour negative materials.