As a complete upright virgin :
I mean in the world of commercial vacuum cleaners. What are these like with general office debris like paper clips, staples, drawing pins, pen tops etc, does it cause any problems?
A lot of cleaning companies do prefer upright's, so there must be a reason, considering the massive cost difference.
Henry's lend themselves in large offices to spot vacuuming only, mainly because of the size of their heads being about 280mm. Try vacuuming a large area or even an entire average office with one and I would agree it would be very time consuming and fatiguing.
Although the Henry seems to service thousands of contracts very well, I do believe that this practice of spot vacuuming has to cause an increase in the amount of dust removal elsewhere simply by the fact that less is being removed from the floor.
I am going to buy one anyway, so I can see how much difference it makes.