There is a place for them. Here is their ideal usage scenario:
Large firm employs contractors to carry out different types of commercial cleaning one of these types of cleaning is window cleaning -say about 20% of work load. They want to be able to equip the van with one pole that is tough enough to take employee abuse, has no telescoping sections to wear and will clean ground to 5th floor. They also do not care if the pole is heavy as they are not the ones using it (this may change with the first £100,000+ RSI claim an employed window cleaner successfully gets awarded).
In the above situation the Carbon-Tec is very popular, I know one firm who has sold 50 of these units to such businesses in the last 6 months.