I have to say. For commercial buildings and flats, that looks like a fantastic product.
Having done commercial work in the past, after about 2 hours of constant looking up and the same arm movements you end up with a massive stiff neck and your shoulders ache. If you are doing this sort of work all day all week, that's a fantastic solution to a big health & safety issue.
I don't see this being practical for domestic work though as you simply arnt looking up for huge amounts of time and your packing away and setting up so many more times giving you neck and shoulders the break they need.