If you could stand the flicker, the CBS system gave
very good color
compared to NTSC).
I think one of the main problems with the sequential colour system was
that it was incompatible -- in both directions -- with existing
monochrome TV. One of the requirements (IIRC) for a colour TV system was
that colour sets should show monochrome programmes correctly and that
monochrome TV sets should show colour programmes as a grey-scale.
-tony