Pure citrus juice usually has an awful flavor when it ferments. Often described as similar to vomit. If you want to marinade with it, I'd suggest tasting a little bit of it first (if you're brave enough) and see if you'd really want to eat something soaked in it. Smell it at least before you taste it.
The container may have been clean, but was it sanitized? And how about the limes themselves? Fruit off a tree is going to have wild yeast all over it's skins. Did you do anything to avoid getting that in the juice? If not, you have a wild yeast ferment going on (and maybe some bacteria as well) so who knows what it'll taste like. I don't think I'd like it on my steak.