Dust out of the foam, not just the fabricA smog season pushes particulate deep into the cushion. Extraction pulls out what sitting down keeps bringing back up.
The seat area stops looking dullBody oils flatten the pile where people actually sit. Removing them restores the texture, not just the colour.
Less airborne dust in the roomA sofa releases what it holds every time it is used. Cleaning it reduces what circulates all day.
Honest answer on old stainsYou are told before work starts which marks will lift and which will only lighten, rather than after.
Fabric or leather, treated correctlyLeather is conditioned rather than shampooed, so it is not dried out by the wrong method.
Nothing paid before the jobThe price is shown upfront and settled once the work is done and you have seen it.