Some of the best bagels I've ever had are from St-Viateur Bagel. Don't visit expecting a sit down or cafe experience as the shop consists of the bagel making operation and a register for customers. Despite this, both times I've visited the service was amazing and they even gave me a free bagel! The prices are affordable and seeing the bagels making process is fascinating. Delicious, affordable, and historically signifient, a visit to Montreal without a quality bagel experience is criminal.