Gave someone a hand today who had bought monomix but needed a little confidence to use it, I think there are easier machines to use and the hopper really is too small, seemed to be a lot of little design faults that would cause a novice to have problems and when you're a bit unsure anyway problems could build into a nightmare very quickly. But having said that you would get used to the machine and it did mix and pump 50 bags of Parex this afternoon easy enough, compaired to my usual pumps it did seem a bit pointy with bits that could hurt hands and limbs, instead of wedges to do things up I prefer the security of a nut and bolt.