I haven’t had it, but there is a description in the link.

Balut is a renowned dish due to its different developmental stages; some people prefer it when the duck embryo is still largely liquid, while others prefer it when it is more mature and has a chewier texture. A combination of savory, gamey, and rich characteristics can be found in the flavor, which makes it an acquired taste that many Filipinos treasure as a culinary treat and a part of their culture.