Once again Liz and I have to express our gratitude to you, Ed, for the brilliant way you have solved our current computer problems. What you did today has undoubtably given our ageing desktop a new lease of life, and many thanks also for sorting out the issues with our laptop so efficiently. As usual, it was a pleasure to see you and we will certainly recommend your services to all and sundry! 
Best wishes, 
Richard and Liz.