Some ads just don't have the room for extended testimonials but where possible add heaps of details.
A few sentences of praise for your product with the persons photo, details about their business if they have one etc, is very powerful. Also where they live and even a website address, email, fax number etc shows that the testimonial about your business or product is genuine.
I am about to set up a clothing label, is there any website links or info available for people setting up a business for the first time? Also i`ve been told about a type of copywrite where you can post everything you want to be copywritten to yourself through recorded delivery, is this true?