The Gel Ink pens are the latest in pen technology. These pens come with a sleek ink that flows smoothly. I've never had this pen clog on me, even when the outside rollerball gets gunk. It still flows, but it's recommended to use a tissue to remove the gunk first. The rubber support gives the pen a soft feel, especially if your hand is prone to cramping. The grip is slim and does not bulge out too far (perfect for small pockets in your backpack) and is incorporated into the pen unlike some pens which have removable grips that tend to get looser and wider every time they are removed. Lastly, this pen has refillable cartridges so less waste is produced.
The pen has never bled through any type of paper with me, including notebook papers. In fact, because of the bold blue ink I've used this pen for highlighting my notes instead of typical highlighters which you can be sure will bleed through the page.