well you know the bath show things that are all in one with the tap and you flick the thingy to either come from the tap or come out through the shower bit...well I only use it for my hair as we have a power shower too..so I would never have ordered this thing
Its like a little thing that goes between the metal bit on the bath and the metal hose line - but you first have to put the shower on for a certain time in a bag and see where it fills to, if its over the line then its throwing out too much water
Thing is I am not stupid, I turn the taps up and down to get how much water I want coming out, I dont have it on full blast
So dont really see the point