One of our favorite destinations when we visited Montreal. I've never been to a farmer's market with items that were as fresh and yet affordable as Marche Jean-Talon.
As others have mentioned, if you're not a local it can be a little difficult to find right out of the metro. When you're on the right block though, there is a sign that will point you in the right direction but of course you have to get to that point first. Just make use of the many maps that are posted around you on the streets of Montreal! And of course it's useful to know that the marche is on Henri-Julien and Jean-Talon.
Vendors have samples and everything is surprisingly sugary. Fresh, beautiful produce - fruit and vegetables alike - are all very affordable especially compared to prices I'm seeing here in NY. I admittedly didn't have enough brain power to even wrap my mind around the meats, honeys, flowers, and snacks that the market offers, but from what I could see everything was perfect. Most everyone I saw there, from what I could tell, were locals which is always a plus when you visit any city!
Love this place and if we were staying in lodging with a kitchen I would definitely have purchased a few bags worth of groceries. But we had to make do with the samples! Mmm can't wait to go back - my stomach is already cursing at me for leaving.