Uni-ball Signo UM-100 Gel Pen - Blue-Black

I bought the Uni-ball Signo UM-100 Blue-Black with a 0.5 mm to see how much thicker it was to the UM-153 with a 1.0 mm tip. It is very inky and lays down a nicely saturated contained line. The tip is not scratchy, but you feel the texture of the paper you are using. I find it more comfortable in hand than the traditional Uni-ball Signo DX with a rubberized grip. I can uncap and cap the pen easily, and the cap posts at the back of the pen with a solid click. I prefer red leaning blue-blacks so I won’t be buying it again once it runs out, but it is an excellent pen and I do recommend it, should you fancy the colour.