I bought three of these acrylic paint markers to test them out. I was a bit dubious about their usefulness, figuring that they were just rebranded markers.
The nib seem to be felted but pretty thin at the tips. The paint flows smoothly, dries quickly and is odorless.
I tried the paints on a half finished figure. They recommend applying over a primer coat, but I applied the paints on bare plastic.
Note that the figure has a resin left hand.
One pass over bare plastic:
Good coverage, the paint flowed nicely and dried quickly. Some of the visible structure is from the paint (left to right), some from the underlying plastic.
Second pass. The lumpy structure on the skin is from the underlying plastic, not the paint, which left a very even coat:
Single layer of the darker RLM over the right hand, only one layer of the lighter color on the left arm and resin hand:
Overall, I'm pleased with these markers and I've ordered some more. Should work great on a primed surface (maybe with only one pass) and should be useful in painting figures as well as pinpoint painting of small parts.