Personally I feel that this is ok for gutters which are not really dirty or clogged up with moss and tree roots etc.
The main problem I see with this vac is the hose's diameter, its too small, it looks like it's a 1'' hose, I use a 2'' and the walls of the hose and the poles I use clug up with dirt; just like an artery.
I am experimenting with certain carpet cleaning products and hair conditioners, such as liquid defoarmers to coat the inner walls of the hose and poles to make them more non stickable.