I didn’t like that the line color wouldn’t show up unless it was on a white background. I love poscas but they don’t have a good line color so I bought these. I just happened to be working on a black background and it wouldn’t show up. They work better on white paper but are not as fluid as a posca. So it all depends really on what kind of work and surface you are using them on.For an acrylic paint pen, I do expect them a little thicker and less watery but other than that, really really goodEasy to useWorks well for awhile.; I got tired of buying a whole package because I ran out of one or two colors, so I looked for the colors I ran out of but after three or four uses the ink was goneThe paint would kinda spill out a tad more than I liked it to but overall good productJust received these three pens and went straight to work. I have been waiting on them to arrive to finish a project. It took FOREVER! Disappointed in the shipping process. That being said the pens are built well and the paint inside is high quality. It is stated as RASPBERRY RED but it comes out more pinkish in color. But color is all in the eye of the beholder. I was hoping for a deeper red. Final thoughts... I would definitely recommend these but if you are in a hurry they are not for you. They were shipped USPS instead of FEDEX or UPS.These work great, but the color is closer to Turquoise than Teal.I used it on my glasses and it stayed on the frame really well good for crafts and cosplay !I ordered the lime green set, the box says lime green but the pens inside say lettuce green. The ink is very pale, closer to yellow than lime, even the pen tops are neon yellow. Very disappointing, why can I not get a lime green pain marker anywhere?Teal colour is a bit off, actually lighter brighter and more blue than shown.Otherwise the pend are fine and as described. Intended for a touch up on some furniture in my case and colour match to the label was pretty good but in reality the colour was different so a bit disappointed.It's not red (even though it's called "true red"), it's pink. There's absolutely no way this is the right colour. As to the quality of the ink or pen itself I have no idea as I have no use for a pink pen.I’ve owned many acrylic markers making use of them highlights in artwork. These by far have been the best. Ink flow is good, ink quality is good and the nib sizes excellent. It requires a bit of initial shaking to get the ink flowing, but then it flows consistently, as required. No smudging or having to shake for half an hour to be rewarded with a blob of watery ink followed by zero flow.Shown as quite a strong red on the packaging, pen caps, adverts, etc. In reality, the colour could be described as a pink rather than a red and I will be unable to use these as intended.