Yay for Fairmount! The bagels are delicious. You can see the bakers hard at work in the background while you order. They also have tons of flavors beyond sesame and poppy, but I only ever get those two. I love how the bagels are completely covered in whatever their topping is-- compare to NY style bagels, which are only topped on one side. The prices are also great, less than $1 a piece if you buy a dozen. And they even sell cream cheese and salmon so you can make your own sandwich!
A must if you visit Montreal.