tried loads of brushes...the superlight is the best by far ... it splays so softly on the glass that you only have to go near the corners and it gets them without you having to...if that makes sense

Also, because of the narrow stock, you can fly down french/patio doors and the brush goes under the door handles easily...
One more point too, its narrower...so those windows with railings are so easy now...
i have sped up by 15% easily.