Certainly one of the best places in Montreal to buy produce. and at the best prices. Be warned though, that this is not all locally grown stuff, as most of the products appear to be shipped in and just sold here as they would be in your local marche. But the prices are generally better and the quality good to better than the local marche.
I walked here (about 3km) and passed many other places to buy oranges and other fruits because of the quality, selection and price. That should speak for itself!