I was given this as a Christmas gift this year and, to be honest, I can NOT be any happier with it! I was on our couch, just doodling with pencils, when I had the sudden urge to paint. Usually when this happens, I am too lazy to get all of my paints out and set up on a table somewhere. So instead I scrap that idea and stop drawing all together. But today I used my water-soluble pencil crayons and then used my new water brushes. Not a spill, easy to clean and the brush-tip is self-cleaning so you don't need a jar of water to rinse the tip or a rag to remove excess water. All you need is another piece of paper and that's it.
Such a simple, inexpensive product. I would not hesitate to recommend this to anyone. It may not be a substitute for brushes, but for quick works or for travelling, it's ideal.