I've tried the silver. It makes objects shiny and metallic looking. I printed at the reccomended 220 temp. I haven't tried the gold or copper yet as I originally had no use for those colors. It's just shamed I had to buy a muti colored bundle to get the only color I wanted. I wished it was available by itself on a larger spool.
Good filament. As with some of the other metallic ones, the picture shows it much shinier than it actually is or actually prints. Still very cool color though. Works well in our 3d pen and Creality Ender 3. No problems with printing.