…I finally found myself in the same location as your painting this week and I am thrilled with it. Exactly as I hoped and slightly bigger in real life than I’d prepared myself for. Now I just have to find a spot that gives it the prominence it deserves. 
I’m very happy to provide a few words as summarising our interaction. 
Given the friendly yet professional nature of your communications, the helpful and prompt attention you gave me, and the excellent quality of packaging then I have absolutely no hesitation in recommending your services to anyone who was in any way unsure. The only reservation I have is that I would like to buy more of your work so don’t want to find you’ve sold it all to others because you get such positive testimonials…
Thanks again John and I look forward to keeping up via your website.