Darlene 

Dear Dr. McAlpine,

I am so pleased that my friends recommended you to me when I was searching for a new gynecologist, and I wanted to take a minute to thank you for the very pleasing atmosphere your office provides. The things you have done may seem small, but they are over and above the ordinary and convey a wonderful feeling of courtesy and respect toward your patients.

Of special note:

A bathroom attached to the examining room
Real robes, not those terrible hospital gowns (made me smile!)
A doctor who personally greets his patients and talks with them in his office before the examination
A wide varity of current, interesting magazines, many relating to good health
No stirrups!
Your receptionist has a lovely telephone and personnal manner. First impressions mean a lot!
Thank you again. I look forward to being your patient for many more years. Don't retire!

Sincerely, 
Darlene