Once you get past the froo frooness of the shop, the actual experience is quite pleasant. My girlfriend had wanted to take me here for quite sometime. I hesitated because it was a very girly thing to do. I finally obliged her and was surprised. We ordered the Duchess of Bedford's Formal Afternoon Tea. It was simply amazing. Our tea was the Chocolate Rose. The service was prompt and great and we also got to meet the owner, an Englishwoman, so this place is very authentic.
Just an FYI, I advise placing a reservation beforehand. We got lucky but got a not so ideal table.
In short, if you want to be a good boyfriend and score points with the woman in your life, oblige her girly side and you'll be rewarded ;)