There's just something about Ten Ren's which makes it appealing and keeps people coming back, because if you simply looked at their prices, you'd just walk right away! Yes it's expensive but their tea's and BBT's are just different than anywhere else (where else can you get Apple and High Mountain Oolong bubble tea?) and I keep coming back to try all the teas they offer!
And yes they offer A LOT of tea. They have a good 10 page menu that ONLY lists different types of teas (BBT's, Fruit Teas, hot teas, cold teas, etc, etc). And they also have a large section where you can buy your own loose leaf teas and tea pots and the such.
They also do offer some food but that's not why I would come here (although I've never tried any dishes yet!)