I cleaned a school last Saturday with it. 8 classrooms 3 of us did it in 3hrs 1man moving the chairs & desks, 1 man pre-vaccing and me cimexing
the result was satisfactory, not amazing but you could tell they had been cleaned, considering no dirt was taken away.
as a test I did the entrance mats which where grafted, I just ran the cimex down the centre and left them until the end, they looked exactly like i had wanded a strip down the centre, very clean, I should have taken a photo.
cost me £5 in chemical ( I bought a job lot off Nick @ Solution)
Mike
ps EDITED; got my maths wrong, i used about £12 in chemical