I may have gotten the wrong color (red doesn't show up well on any surface that isn't white or yellow), but I have been disappointed with this marker. It's worth a shot for the money, but save them for the train.
i've been using my shockers with Magic Ink and Soultip paint. the Magic pen is super clean and makes me have to tag properly. the Soultip/Magic mixed pen is streaky in a good way. i would recommend it with Magic or Pilot ink.