
The pen writes smooth in all colors. I did purchase refills, and have had no problem with them. My only issue with the pen, is not the pen, but the pencil. The cartridge itself is small, so not much lead can fit into it, and is a slight pain to change. However, the pencil spring broke on my pen. I opted to just remove it, and I no longer have the issue. I like the pen enough still, to have bought a second of the exact same model. The pencil spring on the second model feels week, but I simply do not use to the pencil on it, so it hasn't worn out or broken yet. I wish this pen existed, without the pencil and 1 additional color pen.

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