Well, the brush will be great for conny roofs, sills, and gutters.   I think it will do a great job there.  However, I can't get on with it on glass.    It's described as a "robust ‘all round’ cleaning brush for getting into every corner, frame and sills".   For me, i can't get it into corners of windows or the edges of frames due to its  gradual curvature ends, not fitting square and flat on surface areas.  
Back to what I know, and to the their lovely Ultimate range.