Probably it's going to be hard to tell without a scope and a trained eye for a little while. Maybe give it a whiff and report what you smell. If it's pleasant (not gag reflex repulsive) then you're in for an experience. For me, if it was repulsive, like moldy dust, poo, rat urine, vinegar etc, it's probably not ever going to be good. But if you get cherry pie, or pineapple, or a nice leather aroma, something like that... maybe it will finish tastey. Time wise, it could be done in a couple months or many months.