How would you describe the flavor of plain boiled chicken, or of something with more taste, say, hazelnuts, to someone who has never eaten them before? You really can't do it other than by comparing them to other foods known to the person.
But I'll take a shot at adumbrating what Santa Teresa cheese is like. Soft, slightly sharp with a mild milky flavor. Maybe. Whatever. And it's not bad. I think that's the key phrase. It's not bad.