I just started drawing manga, and this is a great set, for beginners. I love that you have 2 tips, so you outline and fill it really easy. A lot of colours, be careful when shading because the ink can bleed through the paper, it might be my paper. But I'm super happy with this set, I might buy another set, because the variety of colours are pretty good! The eyes I drew, I know there are markings under the brown ones, because when I drew the blue ones, I folded the paper, and the ink bled through a little, so beware. But yes they're really fun and useful! Definitely recommend!
Colours are fantastic! I uploaded pictures for you to see, I used other ProMarkers too, but for people who never used them you can see they are worth it. I only did very quick sketch of my model to go to my sketchbook, but the markers won't leave marks, unless you want them to. They are amazing!
The main reason i got these was for wireframing hand drawings for a app I'm working on, the set as a good range of colours and drawing with them feel really great, I used mine on a Letraset pad, it does bleed though the page though.
These are brilliant quality and a great choice for professional artists and those still on their way. The range of colours is amazing and having different packs, like manga, neutral and so on make them very flexible with a wide diversity of uses. Once used, you don't go back to the cheaper alternatives.