There are really 2 issues here. A survey/audit and a sales presentation.
First, a confession. I don't do a "sales presentation" as such. I turn up smart, uniformed and presentable. Overshoes, a bottle of jollop and a white towel. I do a pretty thorough survey. After asking all the right questions I then make an assessment much the same as Chris.
Today was interesting. Madam had had quotations from others, most of whom were 'phone estimates or confirmation of leaflet prices. The only other cleaner to visit and survey was a national franchise who, incidently, was £10 less than me. Madam tells me he gave a superb presentation, had a folder with lots of before and after photographs and lots of testimonials. But he only gave the suite a cursory look. He didn't notice the ink stain which had gone through the fabric into the cushion. Nor the water marks from spillages. All he did was promise a good job. In madam's words, he talked a good clean, but didn't instil confidence in his technical ability, well, not until after she'd met me

So, we should all learn from others mistakes and remember to survey and inspect and test, test, test, as well as making a good presentation.
Safe and happy surveying:)
Ken