Review (4/5): Nice & mostly not plastic
It is really good to use a toothbrush that's mostly wood, rather than plastic. Granted the bristles are still nylon (i.e. plastic), but they're a small fraction of the materials.
It works nearly as good as a typical plastic toothbrush. The only annoyance is that the shape of the neck - a rounded rectangle, in cross-section - seems to make it more susceptible to the toothpaste escaping your mouth. Which can be overcome with a little care, but I wish they'd just round the neck more so that it isn't an issue.