Finally tried this style and it was great. I have old 2 in brushes that are worn down that I tape that I no longer will need to do after using this.  I ordered 5 more Spirit Window Paint Rechampir brushes. They come in different sizes and will add more value than most brushes to my bottom line.  I just helped a homeowner repaint the taller areas in their home that they had no idea how to tackle.  The Spirit Wood cut in bullnose perfectly along the original tape line without me having to tape.