Extremely smooth, and reliable.
I wanted a sturdy slip cap pen that I could use at my office. I frequently have to cap and uncap the pen for short notes so he slip cap was essential. I wanted it to be sturdy because unknowing co workers might be in my office and grab the pen to use, since they're used to ballpoints they don't mind throwing them back down. This pen has been a great addition to my collection. The nib writes wonderfully and it takes standard international converter's. It's really a great all around pen.