Average Tim's. Don't go in the AM or at lunch hour unless you want to wait in a long line-up of office bots.
I like contests so I went frequently during Roll Up the Rim. My overall score was pretty sad with only 2 coffee/tea wins in 20+ trips. Pretty bad!
Other than that it's low quality Canadian coffee (not sure how anyone drinks this stuff), okay teas, baked goods, the odd vegetarian soup item, terrible sandwich choices and bagels. Oh and donuts, lots of flash frozen donuts.