I've tried bubble tea from so many places in Cleveland, and I think Kung Fu tea may have been the most consistent in terms of quality, and the choice to adjust sugar and ice level is the most true to the bubble tea experience you'd expect from Taiwan. Plus, the self-ordering system is really cool!
KoKo Bakery cooks their bubbles the best, but their tea is mediocre.
Fusion Cafe has the BEST quality tea hands down, but their bubbles is inconsistent.
Pacific East and SzuChuan Gourmet are both inconsistent with bubble tea.