Yep, Ive got one. I bought the small one (think it extends to about 7'). I havent really used it though as it is just kept in the van as a spare. It feels a bit heavier than my trusty X-tel pole though but it works well and looks professional.
Dont bother buying the longer pole (I think that extends to about 12') The pole is too long and heavy for using on groundfloor windows and not long enough to clean 1st floor.
Like what everyone else say, go for the harris pole. The reason I didnt is because none of the B&Q's here in Oxfordshire seem to sell them. Anyone know where else I can buy them from? especially the 5m one.