These pens were a real let down for me. I use them daily in my planner and find that though they work fine initially very quickly the output of their ink begins to stutter. This is terrible when trying to produce straight lines or color in anything so they do not make adequate art pens. After less than a month of use many of the pens tips have started to fray badly and cannot even be used for clear writing. I've attached a picture to show what I mean. You will see 5 colored lines (Grey, Brown, Pink, Purple & Red) The red pen I have not used at all so you can see how strong the line is from start to finish. Brown & Purple I use often and you can see how the line starts dark and fades badly. Grey and Pink are the pens I would say I use almost daily, you can see how bad the tip has frayed by how the line created is hallow in the middle. ( In case you're wondering, the nice thick black line isnt a Sharpie, its a Faber-Castell PITT which is a wonderful pen I've used for MONTHS and I'd highly recommend).

In summary, these pens arent worth the price. I only gave 2 stars because the pen does at least feel good in the hand

Excellent permanent markers

Just starting using, really good quality.

Excellent pens, never leave the house without them. The plastic case is a lifesaver.

Absolutely obsessed with these! They do not bleed and they last forever. I'm using them for my adult coloring books. Wish these weren't so hard to find...