I have used the .5mm tru red pens exclusively for a while and wanted to try the 1.0mm. I love the thickness but this pen has terrible performance on smooth paper. It is scratchy it skips and it almost never starts at first write. The smoother the paper the worse this pen performs. On some of my paper the ink just bubbles up on top. My .5 mm pens are older and I notice the ink is a different color so maybe it’s a different ink. It works really well on rougher paper surfaces though like in my sketchbook.
Highly disappointed. Inferior product. The pen feels like there is sand in the ink when you write with it. Did a return on the first package I received. The replacement was no better. I didn't want to bother with a return on the second package. I guess I will just toss them in the trash.