Gongcha is now my favorite bbt place. Their winter melon milk foam is my all time fav. Friendly staff, great service. Toppings are about the same as the other bubble tea places (quality and variety), but their winter melon tea is by far the best I've tried! Also make sure to get their vicinity points card for extra perks!
Their seating is however somewhat limited, especially on weekends. I therefore always get take out.