My go to Bbt joint in the GTA and have been going here for years. Fair prices and great service. Family run business that's different than your chain places that are usually over priced and crowded. You also get free fish or beef balls or grass jelly if you order a large sized drink.
They take care in customized orders and offer different jellies (lychee!) with your tapioca pearls.
It's a small place in the corner at first Markham place next to a Korean food stall.