I had two #04312. The first one was very good (but a little prickly which was OK) for a few months and then it got a reverse "bird's nest". The core stayed stiff but the outer wrap went stupid. After less than 100 uses I took it back to the retailer; the retailer called the North American rep (in Canada, I think) who couldn't have been nicer and sent me a replacement. It was worse than the brush it replaced. I am back to Omega 10049 and Semogue 1305 boar brushes. Horse no more.
Too bad. I liked the handles. :D