"Your service that you do cannot be measured in words and thanking you seems so small in comparison to the valuable work that you do."
"Honestly, we couldn't have done this without you. There is so much information out there that it is hard to weed out inappropriate choices without a "guided tour." Even more important, the ability to bounce ideas and refine our decision parameters is just invaluable. You all are a god send, and I have recommended your service to others that I work with, knowing that some of them could use help today, and some of them will need help in the future."
"Thank you so much for all your help. Your caring and professional way has made me feel so comfortable and not so alone."