Testimonials are so important..
But having just one page for testimonials hardly works. Better than nothing but only just. How many times do you got to a 'testimonial' page? If you do, how many of those testimonials do you read?
You can use them better. Sprinkle short excerpts from testimonials throughout your website.
People are often converted from just lookers to buyers after reading what other people have to say about your product or service. And if they are reading about your product or service and are reinforced by a succinct testimonial as they read, they keep reading or better still 'buy', call or email.