The intense competition between Japanese pen manufacturers produces a joyful new innovative product line every year. The best traits of gel pens have been carefully selected for the Pilot Choose line. LIke the Uniball UM-100 pens (you'll notice that the two look suspiciously similar) the ink flows very smoothly and comes in a multitude of vibrant colors. Like the Uni-ball Signo Broad line, the Pilot Choose ink is waterproof and fade resistant. Lastly, the pens are bargain priced, practically labeled with the color names on their caps, and are made of 73% recycled plastic!! The 0.7 mm line includes the rare ink colors of silver, white and gold, all three of which show up on dark colored paper.