Love this place! The service is consistently good (there have been a few hiccups for my family members but I've had great experiences all of the time).
I always order the Lychee Oolong and what I like about Gong Cha is that when I say "no sugar" you can legitimately tell there is no added sugar. Comparatively at Chatime and other bubble tea spots, there's an overwhelming amount of sugar.
The servers are always pleasant. Only downside is that there's not a lot of parking but the subway is nearby.