If you have a lot of time on your hands and are craving some dessert, this is the right place to go. They have a pretty large selection of teas, smoothies/bubble teas, ice cream dishes, etc.
The main reason that this place doesn't rate higher is the service. The staff are completely irresponsible. If there are options (e.g. bubbles or jelly) they will choose for you instead of asking you. They don't bother to clarify the order so things can end up never coming. If you're in a group, they serve things as they come so one person can end up awkwardly sitting there while everyone else has their food for half an hour or more. I never realized how waiters at other restaurants must plan for this (especially Western-style ones) until it happened to my mom here.