Koh-I-Noor 3X0 0.25 mm Rapidosketch pen review

Got this Koh-I-Noor Rapidosketch single Pen Art boxed set a while back hoping that its performance would've been close to that of the now discontinued Rotring Rapidoliner as a reliable quick-sketching tool. The latter featured disposable cartridges and had a radius nib design that allowed the pen to be held at a comfortable angle and glided smoothly on the paper in every direction for quick flowing drawing strokes. The Koh-I-Noor Rapidosketch pen is refillable with the Rapidograph Ultradraw waterproof black ink bottle provided in the set which is compatible with watercolor coloring once dry. Unfortunately its 0.25 mm stainless steel nib feels rather "scratchy" even on smooth surface papers (like on the Moleskine sketchbook shown), and the pen nib tends to skip producing broken lines at faster drawing speeds. Thus I tend to pick up a Copic Multiliner SP, a Pentel Slicci, or a Pilot Hi-Tec-C gel pen first when I need a fine 0.25 mm line since they are all smoother and more comfortable than the Rapidosketch pen. While I'm not inclined to try pointillism any time soon, the Rapidosketch pen seems better suited for stippling and technical drawing applications rather than quick sketching.