If you soak ground coffee for 12 hours in cold water, then filter it out (1 can of cheap coffee to 12 cups of water is what I use), you get a basic coffee syrup of sorts. If you use good coffee, by all means drink it; it makes great iced coffee, watered down a bit (2 or 3 to 1). If you use cheap coffee, use it as developer.
Once you add washing soda, all thoughts of drinking the stuff will quickly leave your mind; it smells like the grease trap in a bad diner kitchen. I have had some film come out quite stained, other film seems just a bit less contrasty when viewed in the sleeves than normal. All have printed beautifully.