I have been using Digital Propaganda for the printing of flyers, business cards and posters for about five years now. I love the fact that are located downtown because then you can go pick-up for free, whereas most print houses are located in places like Markham and North York.
Digital Propaganda doesn't necessarily have the cheapest prices in Toronto, but I am very satisfied with their quality of printing. I once decided to use another printing company once to save myself about 20 dollars, but wasn't nearly as satisfied with the stock and overall quality of the finished product.
All the people I have dealt with at DP have been really nice and easy to work with. My print jobs are always on time! Highly recommended when you want a quality print job located in downtown Toronto.