I ate at the world's biggest Starbucks. The meal was tasty, and the setting was super cool, but it wasn't worth the $43 I spent.

• I went to the world's biggest Starbucks — the Reserve Roastery on Chicago's Magnificent Mile.
• It sells food and drinks not available at normal Starbucks stores, which diners can take to its rooftop terrace.
• I ordered avocado toast, tiramisù, tea, and a strawberry spritz. It came to $43 with tax and tips.

While I was in Chicago for a conference in May, I decided to check out the world's biggest Starbucks — the Chicago Reserve Roastery.