Bubble Republic has a great variety of drinks and is slightly more authentic than other food-court bubble tea places such as Bubble Tease BUT not as good as TienRen (found at Square One, Yorkdale or Scarborough Town Center). A good thing about BR is that it is cafe style,and is a great place to hang out! Food is okay, some decent cheap eats!
However, it isn't the most authentic when it comes to the classic bubble tea: Black Tea, or any drink that uses TEA as a base because they use a tea bag, and lacks the sophistication of blending Ceylon and Orange Pekoe tea for Black Tea.
For Tea-Based Bubble Tea fans, I would recommend the Taiwanese run shop at The Chase, Mississauga. VERY authentic Black Tea Bubble Tea, and a very yummy Pudding Bubble Milk Tea!! :)