I bought these pens several months ago for my daughter because they are just super cute. And then when they arrived I tried one and had to buy a pack for myself. The way these pens write and the way the ink interacted with the paper was amazing. It quickly became my favorite pen! I used every pen until I was completely out and then went to buy another pack. I love them so much that I bought two packs, anticipating their frequent use. I went to use the pen this morning and the ink was really blotchy and the quality was awful. I opened the pen to check the ink and saw that they had changed the filler from what had previously been used. I checked every pen and it is consistent with all of them. I am super disappointing. They went from being my all time favorite pen to ones that will just sit around the house.I bought these 12 erasable black ink pens (the same company also sells pens that look exactly the same and are gel, not erasable) and have used them for more than 6 months now. The eraser works perfectly, just be careful if the paper is thin as too much friction can wrinkle the paper. The ink is a little gray-ish, like somewhere between a pencil and a pen (which is what makes it erasable!) and writes smooth. Sometimes shaking the pen slightly helps to get it to flow even better. The cap clicks on the bottom so that you don't lose it. I ran out of ink and bought refills, both erasable and gel ink, and both fit because these pens are the standard 13cm. The faces of the cats have not faded. All in all, I love them!Very very cute, but unfortunately don’t write the best. I still love them as a decoration and have them on my dresser.Ok these pens are totally cute and easy to write with and I love themSo the cute cat caps are pointless because these ink pens need to be stored standing so that the ink is flowing down via gravity and always at the tip... or so i thought, regardless of my determination to correctly store them 8 out of 10 times I go to use these pens they don't write.nothing good about these pens. do not buy.Not only are these pens absolutely cute, they don't leak through the page and YES! IT'S ERASABLE!!! It's the coolest thing i've ever seen and honestly, if i run out/dry out, you can bet im going to buy it again!Cute, but had a few flaws, a couple of the pens came in empty, which is quite disappointing.Very cute but don't work very well. You have to scribble, shake, and warm them up to get ink out.