Purchased one of these for use with a range of old games consoles such as the SNES and Megadrive. The thing you notice is that when the picture is static the sharpening employed is very aggressive. Yet as soon as the whole screen moves the picture softens considerably.
There is no way to alter the sharpening.
Shame really as the although the device works, the level of sharpening is too high and the image quality too blurry when the screen moves.
Tested the unit on a SNES, Master System, Megadrive, Saturn, Dreamcast and Amiga and in each case the TV's own SCART input considerably outperformed the unit.