How important is it that your services are easy to sell? Wouldn't it be even better if they were easy to buy?
Why is selling a service so different from selling a product? In some ways, the principles should be the same. The objective is to get the prospect to agree that the way to solve their problem is to use your product or service.
Using customer testimonials in your advertising, marketing materials and on your website is a common practice. If your customers are saying great things about your business, then why not publicize those positive testimonials for the world to see?