Good point Gaz,
I think we all have different ideas of what makes your own paticular "ideal" depending on what we are cleaning and how often. Up till recently there was not much choice, now there is. For domestics cleaned regulary you dont need a brush with much scrubbing power but if your on a 6 monthly thats filthy maybe you do. For commercials you need something different, wider and lighter.
Thats what interested me about Davids reply and the green conservatory muck.
Was it that the bristles lay flatter on the glass and could brush with the sides, because it was a flocked brush or was it bristles length and flex/spreadability ?
For too long we have been told that floor brushes are rubbish and only fit for floors. They are in many cases as good as any major suppliers £50 brush
The Tesco "Melody" brush weighs 9oz/250gm and is Italian.