Daz,
I changed over, what must be 8 or 9 months ago after reading a few threads in the classic pencils Vs fans debates.
well, in short my cleaning time was dramatically reduced, the finish far superior to that with pencils. i clean with a far higher flow rate, but use less water as dirt is washed away quickly and rincing takes no time at all, as the
fans spread the water right across the width of the brush the water sheets straight down the glass.
and despite what other will now say, there is no overspay or dragging of dirt and brick dust
i would never go back to pencil jets.
Darran