Eggs Benedict is the most difficult breakfast dish to pull off in my experience. It requires a delicate balance of flavors to be truly good, in addition to the skill needed to make good hollandaise sauce. During my stay in Montreal, I went to a couple places for eggs benny. Le Vieux Vélo had the best that I tried, by far.
I had the BAB (bacon, avocado, and brie), which aside from sounding the most appetizing also comes highly recommended. I was not disappointed! Everything from the side salad to the potatoes was delicious and perfectly executed. The hollandaise especially was light and perfectly portioned.
Would definitely recommend, and I definitely plan on returning for more one day.