Yes, I will leave it on the domestic pole every day.
I would like tgo be able to fit them to my larger poles, but one has a B.M.S gooseneck on, and the other I think has an omnipole gooseneck on.It is on the higher windows that I think I would get the most benefit from the sill brush, as I have been able to clean sills fairly well on 1st floor windows by standing a bit further away and tilting the normal vikan brush.
But, the higher you go, the less you are able to do this, and in some situations, you can be standing very close to the building, to be able to reach the windows, and it is with these situations that the sill brush would be the only way of cleaning the sills.