is the suction on the pole that strong that it will suck the mud out of the bottom of the gutters or just the leaves etc which sit on top of the mud? 
it looks good like , do you get the wet and dry vaccuum with it or do you buy that seperate?
the suction is very good, they did a demo for me on a customers house which was completly blocked with moss etc, after a bit of breaking up the moss (so to speak) it completly cleared it, i was impressed.
on the website it shows the vac hose going up the side of the pole, this has now been adapted so the bottom of the hose is attached to the bottom of the pole/tube therefore making it easier to operate and it's not that heavy.
my only reservations is, it will have no probs cleaning out the gutter but will it work aswell on a blocked downpipe?
maybe not! if this is the case that will be the only time i would be required to get a ladder off the van.
i allready have 2 jobs booked in advance prior to my marketing it
another added bonus is that you could also use it as a flood damage vac, could be handy for those in the oxford/shefield areas!