I've had almost everything they have and I've enjoyed them all. My favorite is the Dark Knight, which is a roasted oolong milk tea with herbal jelly, I believe is what it is. You can get most everything from 0 (no sweetness) to 125 (more sweetness than normal). The only exception is the Thai tea.
The staff is always welcoming and when my daughter asks for them to surprise her, she's tried everything as well, the staff has something for her in mind.