I love purple pens. They are a friendlier color than red for editing, I mean who gets mad at purple comments.
I like the rollerball much better than Energel needle tip, and the color purple is dark, and clear. The Energergel offers a smooth writing experience and a bold line. Happily, this is retractable, which is a big plus for me. I am indifferent to the grip, it's helpful but not particularly finger comfy.
I love how the Energel does well with small and big writing, making it a solid choice for a writer or artist that appreciates a bold line. Precision line fans should pass this one up. It did well for my purple people eater sketch.
Overall, this got a 4/5 for me.