I used paint pens back in the 80s when they were new and exciting. I bought these, and some acrylic from an off brand company. It took a good 5 minutes for each of the Sharpie brand pens to prime and I still have to prime them between uses. The acrylic pain pens from the off brand company primed in four pumps. I'm uncertain whether it's acrylic vs water based paint, but it's fair to note the priming time. We get a new toy, we want to use the toy asap! The lines are Very fine, which earns a star. I was able to write on my stitch markers (it's a Tiny surface) with these pens, but not the acrylic (which were also touted to be fine point). Overall, if there is something that needs marking or fancy writing, the point on these pens is going to be a good choice. The paint wipes away easily enough with water, whereas acrylics will require nail polish remover or some such. That's both a bonus and a minus. If your child marks up your dresser with these pens, it's a bonus. If you spend hours decorating a project and someone swipes their sweaty hand along the surface, it's a minus. Porous materials like drywall and paper will render the paint permanent. If using these on glass or ceramic, I recommend sealing the item to preserve the decoration. They're odorless. So are the acrylic, though. That's something that's changed significantly since the 80s! I can still remember Susan P. borrowing my pen and sniffing it before returning it. White Out, too. That Susan . . . wonder what ever happened to the ol' gal. Meh, she threatened to ruin my reputation (I was the new kid in 5th grade, hahaha - so very important, a reputation, at that age) if I didn't let her cheat off my paper for a test. Joke was on her - I didn't study and hated history! She didn't say she had to pass, only that I had to let her cheat. Details, folks. Which is why I'm going so in depth for this review. Oh, we got busted because I can't get away with Anything. I got to retake the test, she had to accept the fail. Good times. I have my tincture bottles that nothing else will write on, but I can read the paint from these pens. The colors are Very light in tint and pigmentation. They're going to work best on dark surfaces, and are barely visible on light backgrounds. My red, blue and purple stitch markers are easy to read, the aqua, yellow, orange, and pink are not. The package I received had two orange / peach markers whereas the picture shows a purple - I had no such purple included. Bummer, that was the one that I was looking most forward to. The description even states, "Colorful options: Includes blue, green, orange, pink, and purple Sharpie Paint Markers" Oh well, win some, lose some. Because they will wash off non-porous surfaces I use them to label our tupperware containers. Just don't do it on the textured areas or it will be permanent . . . ish. These would be helpful for marking rubber hoses, lunchboxes, lunch bags, decorative boxes, presents, rock painting, glass marking, ribbons, fabric, ex-boyfriend's car (just kidding - don't do that, or if you do, don't blame me!), etc . . .. Remember: porous = permanent; non-porous = temporary After a little internet sleuthing I found the manufacturer's answer to the "how to store" question. They say, "We recommend to store the product on how they we're packed where in vertical position and the nib is upward." If you found this useful, smash that like button and follow me . . . wait, this isn't YouTube. I don't even have a YouTube channel! I've been brainwashed by social media. Pardon me for the glitch (but do upvote if you found this useful - there's little point in using my time to inform folks about purchases if no one finds them useful! Or funny, I'll take funny.)