I haven't tried the Metro yet. I did get one spool of Floriani to try, I think it has the highest sheen currently available on the market. I don't use rayon thread, my Brother/Babylock embroidery machine doesn't like rayon for some reason, and I tried a King Tut metallic but the thread was too "loopy" and didn't work well. I think the spool was wound incorrectly, happens sometimes.