I think Jimmy John's does a good job making excellent bread. I'm not sure that it is bakery quality, but it is definitely noticeable. I've bought their day-old bread instead of grocery store baked bread. I think Subway's bread is pretty good, too, except they skimp on the flour.
The aroma of bread being baked is a glorious delight, yet somehow whenever a Subway is baking the smell gives me nausea and I can’t even go near the shop. Yes, it is edible and inoffensive once baked; I have no idea what they do to make the baking process smell so badly.