It just depends on what work you clean as well...I have lots of work with awkward angle windows,skylights and 3 storey windows so an xtreme helps a lot in reduced strain during my working day.i also have some large properties where I need my 25 ft pole fully extended just to reach the first floor windows.....
Defo agree. About 90% of my work is using the Xtreme 35 6 of the 7 sections. My round is mainly rural and full of farmhouses, manor houses and the like. It'd be nice if I could only use an Xtreme 18 but most of the windows wouldn't get cleaned.