My system came with the Unger pole setup, now these aren't the best poles out there, they are in fact one of the cheapest and one of the lightest too.
They are very adaptable, you only use as many sections of the main set of poles as you need, the pole hose is on the outside of the pole and this makes using however many section of the pole you want an easy matter.
I also have 2 other poles quite independant of the main setup, both are Unger ones, the 5ft one (extending to about 10ft) was the one I always used prior to WFP, the second one, a 2ft 6in one I bought for use with the pole.
These two are a doddle to use, I just unclip the the brush and pop it onto either of the other poles.
Sometimes I just unclip the brush and don't bother using the shorter poles, the brush is attached to the Unger angle joint that allows you to vary whatever angle you wish to have the brush, so when you pop this off the pole you have the equivalent of a very short extention pole (18in or so). For many downstairs work I find this fine.
So remember, there ARE other options out there!!
Regards,
Ian