It is quite big at 39" US. I used to use a 36", along with a 24", and 18". For bigger glass it does get the solution off. A down side fanning is limited, and more detailing. Now I use 18",12",and 6", in Wagtail or Moerman POV handles. These handles are low to no detailing. In conclusion a fine tool for large windows, but impractical many jobs.
iT does work if you are working in 2´s and have MANY wide and high windows ( more than 20 for example on a regular basis) with straight pulls .. iF you have a building (s)like that then yes .. other wise it will stay in the back of the van gathering dust ..