I have the Spotmaster and it's been very useful and paid for itself very quickly. I didn't realise how often I had to get an extraction machine off the van, set it up with hoses and handtool, fill it up and spend a few minutes dealing with a stain. It could take four times longer setting up than it did to do the work! I carry the Spotmaster in one hand a bucket and a bottle of spotter in the other, in and out in a fraction of the time without the hassle. I do a yearly clean of a single chair for an elderly lady in an apartment block which was always a pain, dragging all the gear across the car park then up a dozen steps, up a lift along a landing then into the apartment. I won't be dreading it with The Spotmaster this year, it has the capacity to clean a chair without any problems. I would probably use it to clean a bathroom on my hands and knees rather than set up a bigger machine. I am using it once a day for the next three days = 3 x £60 call out charges, I wish I'd bought it ages ago. Alltec also do their version of the same machine too.
Hope this helps.