I first purchased my Uni-ball pens about 3 years ago, and I haven't found a pen I like better, regardless of the cost. These pens are ultra-smooth and are filled with ink that is very smooth flowing, in your choice of black, blue or red. They also are available in your choice of micro, which produces the finest, thinest writing possible, and fine, which produced writing a bit thicker. I personally prefer the micro for it's ultra-thin marks. The body of the pen itself is black, with an aluminum pocket clip. There is a small colored band close to the tip of the pen that let's you know, at a glance, what color pen you're using.
Everywhere I go, I have my Uni-ball pen clipped to my shirt. If I ever have to fill out a form or do any writing at all, I have my pen. Even if offered another pen, my response is always "Thanks, but I have a pen."
Sanford, the makers of the Uni-ball, has a satisfaction guaranteed policy on every pen they make. If you're not happy for whatever reason, they'll replace the pen or refund your money.
If you're looking for an ultra-smooth pen for a great price, you won't go wrong with Sanford's Uni-ball Roller!