Its not that bad really, taste just grates on you after a while. In fact if you've ever eaten a lemon pound cake out of an MRE it tastes almost exactly like that only not as crumbly, its more moist and a little more chewy. Its fortified so I imagine you could live off it alone for some time."Lemony cake substance" and hardtack both seem like words you'd write onto 3x5 cards and throw darts at to decide which one you'll be eating.