Even after 15 years of machine quilting service, a great testimonial like this one is still much appreciated.
Dear Kathy & Geoff,
I'm writing to thank you both very much for the lovely finish to my quilts. I was so surprised to receive them in yesterday's post, after only personally delivering them to you Thursday week ago. You have done a wonderful job on them and they will be very much treasured.
(Quite happy if you want to put this in your testimonials).