Now HERE is a great email survey invitation!

Equinox Fitness runs a chain of health clubs in and around several major cities. I have never been in an Equinox club, but I hear good things about them from friends who are members in New York and Boston.
One of these friends sent me an invitation he had received recently to provide feedback. Clearly, as a member, he found the invitation remarkable enough to forward it to me. He also tells me that it was dead easy to complete the survey.
You can see the survey attached here. It asks the question "How likely would you recommend Equinox to a friend or a family member?" (Yes, I agree, they left out an important verb in the question.) The body of the email includes a large, easy to read clickable box for each potential answer from 0 through 10. When you click on one, you are taken to the survey, where your answer to the first question is completed for you (I think you can change it, if you like), and you are asked to explain your rating.
A few things I really like about this invitation:
- Very clean, simple, branded visual display
- Gets right to the point -- no long preamble
- Tells you right up front that there are only three questions
- Allows you to answer the first one while still reading the invitation -- skips at least one and maybe two steps over most similar surveys
- Personal. A human being in a leadership role "signed" it