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I stated my comment a few times already. Only the first generation iScan Plus V1 gives a smooth color/grayscale. The V2 and the Pro (V3) show color/grayscale banding/dithering in many dim and some bright scenes and picture looks awful. The V2/V3 does have better deinterlace performance.
Unless they release a V4 that fix the problem, I'm strick to the old V1.