Using an extension pole on small to medium sized windows, either upstairs ones or just the ones above a conservatory is difficult, Jeff may well be the exception that probes the rule, but few of us will do the job to any acceptable standard.
However.....
A few months ago a link was put on the forum that showed an american pole....I think, but I'm not sure, that it was called a propole......or perhaps it was procurve?
There was a video link of it in use on high, difficult buildings.
The pole was like a standard extension pole but was curved at the business end.
The squeegee on the end could swivel, I was really impressed when I saw it in use...with a 6' pole this guy could do the 'Turbo' Terry 360 degree rotation thing, and didn't even need to bend down when using it to squeegee off glass that went all the way to the floor.
Can anyone remember seeing this pole in action?
I'd love to find the link and re-post it

Ian