Technically speaking, after I change from normal RCA composite to S-Video cable. I notice the increase of contrast and colors (visually). But this increase actually makes the pictures a bit blocky, or looks a bit pixelated.

From my observation it seems to me that watching astro with the pics not so sharp, it will look smoother and better as if those fast moving scenes it will be badly affected by the sharp pics.

As I have bought the S-video cable to test, (RM 15 from All IT) I use it but I reduce the sharpness on the TV, it does look better but not significant. I gain an increase in better colors but tone down the sharpness to make up for a smoother image rather than a sharper or blocky one.

If u haven't buy the cable. I would say it's not significant. Many shop assistants would say this TV include S-Video connection to make better picture quality but in fact our astro quality is bad at the first point.