Hof Kelsten is the latest addition to Mile End's boulangerie scene, and it instantly became recognized as a city-wide contender. Baker/owner Jeffrey Finkelstein built up a reputation supplying many of Montreal's top restaurants with their bread before opening up to the public. The approach leans towards Central Europe (caraway rye, rugelach, babka, etc.), but Hof Kelsten bakes some French loaves too (including my favourite Montreal baguette at the moment).
They also serve meals (lunch, brunch), but so far I've stuck to the baked goods. The pastries are generally good, and they're definitely refreshingly different from the kind of fare one tends to find in Montreal's bakery scene, but I've encountered problems with undercooked items from time to time, so now I just focus on their bread.