I say yes, but I think maybe it should be yes and no... There are only three colors in the set that are visible on paper so therefore those three .. black.. pink and cranberry.. are excellent.. the others are so light on the page they are barely visible. Adding the little ruler was a nice touch.
Although I do love the bright colors of these markers, unfortunately they do not do the job. At times they make blobs and at times it skips. I've experimented with holding the pen at different angles, and this makes the blobs smaller, but I now hardly ever use these pens.
The ink flow is erratic. Sometimes I get blobs and other times it skips in places. Although the ink does not bleed through the paper, the pen lines do "emboss" the other side of my thin Bible pages. The yellow is very faint. The pink and blue make heavier lines than the green and yellow. I stopped using these pens.