Excellent for crafts and construction.
If you are looking for simple classic markers for painting, they may not be suitable for you because their colors are dark.
If you paint, I mean really paint, not just a sun and a house, you will love them!
Indeed, the colors are metallic and have a nice satin metallic shine.
They are ideal for invitations, crafts, decoupage, etc.
On glossy surfaces, they need varnish to stabilize. However, they do not come off on porous surfaces.
On wood, which I usually use them on, they usually take 24-36 hours to dry completely and not fade.
Note that the colors slightly change if varnished. They retain their metallic hue but become darker.
On invitation paper, they take 3-4 hours to not smudge (if you run your hand over them) and about twelve hours to fully stabilize and "show" their color.
Odorless, practical, they do not tire the hand and you can make detailed designs.
Store them sideways to preserve their ink. This is very important because even if you put them with the tip down, you have issues with the ink and you think the marker is finished, but it is not!
Finally, as for durability, I have made 300 invitations with one marker, painting only 1/3 of the surface, and I still use it for other small projects.