TheSunRisesInTheEast
We have a Vax carpet washer, it's very heavy, but obviously the water tank will make any model heavy. It does a really good job and the scented detergent leaves the carpets looking like new and smelling lovely and fresh. The dirty water is a bit of a shock, proof that carpets really do need a regular wash!
My VAX does a darn good job with any of the VAX detergents - I find the bog standard basic stuff (£10 for 1.5 litres) works just as well as the more expensive types in the VAX range.
But even with the water tank emptied it's still a pretty heavy machine. And, yes, the colour of the water when finished is a bit of a revelation!