I use mine like Andy. Usually to enhance home made or canned or when I need a small amount -- like a cup or so. I buy canned broth (Swanson's low sodium) by the can and by the carton, but sometimes only have a carton or only need 1/3 of the can.
I sneak a tiny bit into salad dressings and marinades. I use it for brines. Pan sauces. Mashed potatoes.
I admit to having used it in place of homemade or canned a few times, but it isn't as deep and rich as I would like.
I also use mushroom flavor "Better than Boullion" sometimes, in small amounts. That has a good and unique flavor. I don't know if it has msg in it -- but then again, i add a pinch of Goya packets to a lot of things I make.