i think they are pretty cool, not very practical for drawing but they look cool when you like see the inside things move and you can see all inside colors at once, its truly a big step in the pencil industry. they lack sturdiness though, since all pencils are inside they like jiggle easily which is why they arent that good to draw or even write with, cool concept mid execution. if someone makes these pens sturdy and strong itd be revelutionary