Shaun....I have tried using steam on flatweaves....
DO NOT UNDER ANY CIRCUMSTANCES TRY IT WITH PILE FABRICS.
This was after an extraction clean...I can't remember the reason why I tried it now it was so long ago.
It may be OK for a 'highlight' clean on very lightly soiled fabrics but doesn't compare with the 'real thing' ...I much prefer to go the whole hog every time...