Creighton is right i am a 10 stone weakling and i have no trouble getting it in my Dispatch just tilt the front wheels in and lift the back, having said that i would not take it up stairs it is heavier than the Ninja i had before, but i have never encountered a job i have not been able to get to i just run a long hose i had a job yesterday and used 100ft of hose without any noticeable loss in vacuum strength
my machine either stays outside or in the van, i think the debate over this machine and the Scorpion will go on for ever both owners thinking the machine they have is best, i think power wise there is nothing in it but all things being equal the Airflex looks the part too, wheras the scorpion is a tried and tested machine, the Airflex is newer but no known faults in design etc have appeared so all in all it is in my opinion a well thought out machine.
Customer service is also excellent at both these suppliers, i learnt the hard and expensive way with my old Ninja and now enjoy good customer service at Cleansmart although i still do business with Solutions UK as well, whatever machine you opt for if you go for the Airflex get 2inch hose and not 1.5