Pack/12 Private Reserve Fountain Pen Ink Cartridges, Sonic Blue

I just received my ink cart., I put them in my Shaeffer calligraphy fine nib fountain pen and it worked fine!!! However it took a long time to make the ink pen work. I couldn't tell IF I like it or not because the pen is making the ink flow rather fast. It is a more wetter ink but it seems to dry quickly. Haven't used it on good paper yet, but on cheap paper it does not bleed or feather. I will update this as soon as my better pens need a refill.