Tested, and the verdict is... good stuff... mostly because it's so small, it's really tiny.
Not much difference between the monitors and TV's I tried, if any visible at all,
but that's also a good thing... as it's for mon/tvs having trouble with Composite Sync.
There is a slight color difference on sand colors (bleak yellow/light brown) when switching between
the built-in sync and composite and just a fragment of difference of that when using the sync cleaner, probably just because the Composites higher video voltage slips threw somewhere, other colors seems unaffected, and I'v tried filming it and taking a photo of it but the difference is just to small for the CCD to catch any of it.