I've been on a boba binge for a month now. The best I've found is Ten Ren's in Rockville. Next to that is Green Tea Cafe, on Darnestown Rd also in Rockville. A&J's version is also very good. Teaism, much as I love the place, makes horrid boba - overcooked, mushy goo one time and rock-hard the next, and I couldn't identify the flavor. Teavana, in Tyson's Corner Center, makes an acceptable one. Please note, the previous opinions apply to black tea only, not fruit flavors). Hope my findings are useful...