Schneider Slider 755 M Ball Pen Refill

Fantastic refill. It writes much like the Parker QuinkFlow M refill. It might have slightly less drag, so it might feel a bit smoother. It is completely waterproof. I like it better than the Schmidt Easyflow 9000 F because it's easier for me to control and doesn't skip or smudge. As a hybrid, low-viscosity ink, it is less slippery than a Jetstream, but still feels smoother than conventiona, oil-based refills. I like the shade of blue and find it appropriate for work or school. The color is not very bright or saturated, but that's perfectly fine with me. The M designation is perhaps a bit misleading, as, to me, it writes more like an F.