Willem entered the world of comics in 1993. He's been a busy bee in other disciplines since then as well, often mixing two or more of them: illustration, sculpture, writing and painting.
Since 1997 Denise Jansen and Willem are Plusminus Produkties. They are a "cut and paste" duo, that works in a quite comparable style with different qualities. Denise works with a clean neatness and strives for perfection working solely on canvas, Willem is after speed and combinations that surprise, and works on any material, the results of both are of the same language.
Paradoxes in their work made a correspondent remark "sugar coated horror", about their art, this is close to how they experience it themselves.