These faber castell brush tip pens are awesome. They write really smoothly, come in cool colors, and the brush tip allows you to play w/the stroke thickness. I use these pens as my primary work pens, as well as pens I use to doodle w/at home, especially w/my kids. I think some people are surprised when they see business documents signed in a variable width lime green ink but they should get over thinking all signature pages need to look boring.