Just got these STOBOK brush pens and here's my honest take after testing them out for a week!

The good: These are seriously affordable for a 30-piece set. The nylon tips hold their shape well, even after heavy use. I love that they're refillable - just unscrew the base (though be warned, it takes some muscle). Perfect for watercolor blending when you want that painterly effect without carrying bulky supplies.

The meh: Water flow can be tricky. Sometimes they leak, sometimes you have to squeeze like crazy to get any pigment out. Not ideal for precise work - more suited for loose washes and blending. The caps post nicely on the back though, which is a nice touch.

Pro tip: They work best with tempera or powdered pigments rather than traditional watercolors. Great for students or quick sketches, but pros might want something more reliable.

Final verdict? At this price point, they're decent starter brushes but don't expect premium performance. Good for experimenting with different techniques!