We have done the tea too...and LOVED it! The first time we went, only one person in our party of 7 wanted to do it, and it was her only "must do" meal that trip, so we agreed to go. I was DREADING it (I am so not a Frou-frou princess girl), the two then 10 year old boys in the party were trying to stage a revolt, the two teenage girls were "whatever", and the lone adult male was looking at it as a "life experience" (his words). Well, we went....
and EVERYONE LOVED IT!
The two boys even asked to go agin the following year when we mom's went back to WDW with them...yes I said two now 11 year old boys wanted to go back. They both LOVED the Mrs. Potts Tea (chocolate milk, sandwhiches and desserts!) Most of the adults had the Prince Edward Tea maybe...tea, tarts & scones, sandwhiches desserts and tea.
I agree with the other posters...definitely make an ADR as it is a small place and does get rather crowded some times.
Also, someone asked about makeing it lunch...we were so stuffed after this, that we had to cancel our dinner ADR that night...after the first visit.