Most needlepointers I know try to avoid DMC’s metallic flosses, I know I do. It’s not that the colors are bad, it’s just that the single-strand metallics that come in different sizes from Kreinik and Rainbow Gallery are so much easier to use.
But Stitched Modern. a cross stitch company, has put together a great bunch of tips for using this thread. I love them, especially the idea of combining metallic with its matching floss!