That's exactly what I have been drinking. I started with one cup at 32 weeks, increased to 2 cups at 34 weeks, will up it to 3 at 36 and 4 at 38 weeks. I'm getting used to it now, it didn't excite me to begin with as I find it very bland but actually I quite enjoyed my first cup this morning. Let's hope it works.
Edited to say that I've not experienced anything out of the ordinary since drinking the tea and no Braxton Hicks either.