It is an excellent card, but can have problems with interference patterns on the composite input which I think is due to insufficient filtering on the power rails. It is a bit of a lucky dip as to whether you get a clean picture in a particular PC.
(A good quality power supply is a must with cards that are on the edge of tolerance)
The 3D comb filter is somewhat useful, but introduces a lot of artefacts as most 3D comb filters do.