I’ve generally shied away from gel pens because they’ve always leaked smeared or bled through paper. I tried these at the store and liked the way they felt so I bought a pack of blue ink .7 mm tip pens and I love them. I’ve been using them for the last week and they don’t smear or leak and they barely bleed through thinner notebook paper. While the writing is a little visible through notebook paper and my check register paper it’s not very bad and it’s not blotchy. I think I’m going to get a pack of .5 mm tip pens as well.